#MySQL Database Development

[shilshatech]

Looking for professional MySQL Database Development Services Company in India, we deliver fully managed, enterprise-ready MySQL databases, supporting robust application development. Our talented developers build powerful and scalable web applications, ensuring high availability and dynamic scaling for websites with massive data and user volumes.

[techsolvecentral]

🔁 How to Use Multiple Databases in Laravel 12 (With Examples)

Laravel is a powerful PHP framework known for its elegant syntax and developer-friendly features. In real-world applications, sometimes one database isn’t enough. You might need to connect to multiple databases — for load balancing, microservices, legacy systems, or simply keeping things modular.

#laravel #php #database #developer #coding #tips #programming #webdevelopment

[attitudetallyacademy]

Build a Strong Backend: Why Web Developers Should Focus on MySQL Early

Mastering the backend is essential for building powerful and scalable web applications — and it all starts with MySQL. As one of the most widely-used relational database systems, MySQL plays a critical role in data management, performance optimization, and secure backend architecture.

Whether you're an aspiring web developer or looking to level up your programming skills in Yamuna Vihar or Uttam Nagar, starting with MySQL early gives you a solid foundation in backend development. From storing user data and managing queries to building dynamic websites, MySQL knowledge is a must-have in today’s job market.

Take the first step towards becoming a full-stack developer by learning MySQL along with HTML, CSS, JavaScript, PHP, and other essential programming tools. Gain practical experience and boost your backend development skills to stay ahead in the competitive tech industry.

📚 Learn Web development: Attitude Academy

📍 Visit Us: Yamuna Vihar | Uttam Nagar

📞 Call: +91 9654382235

🌐 Website: www.attitudetallyacademy.com

📩 Email: career@attitudetallyacademy.com

[hiringjournal]

How to Hire the Right MySQL Engineer: Skills to Look For

For any business that handles structured data a solid database foundation serves as the key. MySQL continues to dominate the market as one of the most reliable and widely utilized relational database systems. Whether it’s managing e-commerce transactions, user profiles, or analytics, having the right talent can have a significant impact on performance and scalability.

That’s why several tech companies are considering hiring database engineers with MySQL proficiency. This helps to manage the growing database needs. But how do you know that you are hiring the right fit for the job? In this article we will breakdown what you need to look for when you set out to hire these experts.

Key Technical and Practical Skills Every Business Should Prioritize

Strong knowledge of SQL and database design

Fundamental SQL expertise is a must when hiring MySQL engineers. Your ideal applicant ought to:

Create secure and optimized SQL queries.

Recognize data modelling and normalization.

Understand performance indexing techniques.

Have the ability to create triggers and stored procedures.

These abilities allow a MySQL engineer to increase speed and storage efficiency, which is essential for rapidly expanding tech companies. 

Experience in performance tuning and troubleshooting

Performance issues arise as your data grows. A proficient MySQL developer ought to be able to:

Find and fix slow queries.

Keep an eye on and maximize database load.

Make use of programs such as MySQLTuner, EXPLAIN, and performance schema.

Set up the server's parameters for best performance.

In SaaS setups or real-time applications where latency is a concern, this becomes even more crucial.

Data backup, security, and recovery skills

A business can be destroyed by data breaches or loss. A trustworthy MySQL developer will:

Configure automated backup plans.

Put user roles and permissions into practice.

Secure connections and encrypt data.

Create scenarios for catastrophe recovery.

These abilities guarantee data security and regulatory compliance, which is particularly important for the high-security, healthcare, and financial sectors.

Integration and collaboration capabilities

MySQL engineers don't work alone. They frequently work along with software developers and backend teams. You might also have to:

Fill positions like hiring backend developers to assist with application-side logic.

Employ database engineers for distributed or more complicated settings.

Hire software developers to create data-driven, scalable products.

A MySQL engineer with cross-departmental collaboration skills guarantees more efficient operations and agile delivery.

Familiarity with modern tools and frameworks 

Present-day MySQL programmers must to be knowledgeable about:

ORMs such as Eloquent, Sequelize, or Hibernate.

Cloud-based solutions like Google Cloud SQL and AWS RDS.

Tools for monitoring such as Prometheus or Datadog.

Pipelines for CI/CD database updates.

For the majority of tech businesses that use cloud-native solutions, this demonstrates adaptability in contemporary development settings.

Closing Remarks

If you are serious about your data infrastructure, you should hire MySQL developers. Seek applicants that have excellent technical proficiency together with teamwork and problem-solving abilities. Results can be increased by matching your MySQL specialist with the appropriate team, such as hiring software engineers, regardless of whether you're managing a legacy system or scaling a SaaS platform. Choosing the proper database hiring is a commercial choice for tech firms, not just a backend one.

[nubecolectiva]

How to Clean a Table in MySQL Workbench.

Como Limpiar Una Tabla en MySQL Workbench.

👉 https://blog.nubecolectiva.com/como-limpiar-una-tabla-en-mysql-workbench/

[scloudsg]

Set up your own MySQL database on cloud within clicks! Every developer must try!?

[n-school]

Time is running out! Enroll now and ignite your coding journey with our comprehensive PHP course. Let's turn those goals into reality together!

Contact Now: 090434 94941

For More Details: https://www.n-school.com/php-course/

[codingquill]

Essentials You Need to Become a Web Developer

HTML, CSS, and JavaScript Mastery

Text Editor/Integrated Development Environment (IDE): Popular choices include Visual Studio Code, Sublime Text.

Version Control/Git: Platforms like GitHub, GitLab, and Bitbucket allow you to track changes, collaborate with others, and contribute to open-source projects.

Responsive Web Design Skills: Learn CSS frameworks like Bootstrap or Flexbox and master media queries

Understanding of Web Browsers: Familiarize yourself with browser developer tools for debugging and testing your code.

Front-End Frameworks: for example : React, Angular, or Vue.js are powerful tools for building dynamic and interactive web applications.

Back-End Development Skills: Understanding server-side programming languages (e.g., Node.js, Python, Ruby , php) and databases (e.g., MySQL, MongoDB)

Web Hosting and Deployment Knowledge: Platforms like Heroku, Vercel , Netlify, or AWS can help simplify this process.

Basic DevOps and CI/CD Understanding

Soft Skills and Problem-Solving: Effective communication, teamwork, and problem-solving skills

Confidence in Yourself: Confidence is a powerful asset. Believe in your abilities, and don't be afraid to take on challenging projects. The more you trust yourself, the more you'll be able to tackle complex coding tasks and overcome obstacles with determination.

[the-nox-syndicate]

SysNotes devlog 1

Hiya! We're a web developer by trade and we wanted to build ourselves a web-app to manage our system and to get to know each other better. We thought it would be fun to make a sort of a devlog on this blog to show off the development! The working title of this project is SysNotes (but better ideas are welcome!)

What SysNotes is✅:

A place to store profiles of all of our parts

A tool to figure out who is in front

A way to explore our inner world

A private chat similar to PluralKit

A way to combine info about our system with info about our OCs etc as an all-encompassing "brain-world" management system

A personal and tailor-made tool made for our needs

What SysNotes is not❌:

A fronting tracker (we see no need for it in our system)

A social media where users can interact (but we're open to make it so if people are interested)

A public platform that can be used by others (we don't have much experience actually hosting web-apps, but will consider it if there is enough interest!)

An offline app

So if this sounds interesting to you, you can find the first devlog below the cut (it's a long one!):

(I have used word highlighting and emojis as it helps me read large chunks of text, I hope it's alright with y'all!)

Tech stack & setup (feel free to skip if you don't care!)

The project is set up using:

Database: MySQL 8.4.3

Language: PHP 8.3

Framework: Laravel 10 with Breeze (authentication and user accounts) and Livewire 3 (front end integration)

Styling: Tailwind v4

I tried to set up Laragon to easily run the backend, but I ran into issues so I'm just running "php artisan serve" for now and using Laragon to run the DB. Also I'm compiling styles in real time with "npm run dev". Speaking of the DB, I just migrated the default auth tables for now. I will be making app-related DB tables in the next devlog. The awesome thing about Laravel is its Breeze starter kit, which gives you fully functioning authentication and basic account management out of the box, as well as optional Livewire to integrate server-side processing into HTML in the sexiest way. This means that I could get all the boring stuff out of the way with one terminal command. Win!

Styling and layout (for the UI nerds - you can skip this too!)

I changed the default accent color from purple to orange (personal preference) and used an emoji as a placeholder for the logo. I actually kinda like the emoji AS a logo so I might keep it.

Laravel Breeze came with a basic dashboard page, which I expanded with a few containers for the different sections of the page. I made use of the components that come with Breeze to reuse code for buttons etc throughout the code, and made new components as the need arose. Man, I love clean code 😌

I liked the dotted default Laravel page background, so I added it to the dashboard to create the look of a bullet journal. I like the journal-type visuals for this project as it goes with the theme of a notebook/file. I found the code for it here.

I also added some placeholder menu items for the pages that I would like to have in the app - Profile, (Inner) World, Front Decider, and Chat.

i ran into an issue dynamically building Tailwind classes such as class="bg-{{$activeStatus['color']}}-400" - turns out dynamically-created classes aren't supported, even if they're constructed in the component rather than the blade file. You learn something new every day huh…

Also, coming from Tailwind v3, "ps-*" and "pe-*" were confusing to get used to since my muscle memory is "pl-*" and "pr-*" 😂

Feature 1: Profiles page - proof of concept

This is a page where each alter's profiles will be displayed. You can switch between the profiles by clicking on each person's name. The current profile is highlighted in the list using a pale orange colour.

The logic for the profiles functionality uses a Livewire component called Profiles, which loads profile data and passes it into the blade view to be displayed. It also handles logic such as switching between the profiles and formatting data. Currently, the data is hardcoded into the component using an associative array, but I will be converting it to use the database in the next devlog.

New profile (TBC)

You will be able to create new profiles on the same page (this is yet to be implemented). My vision is that the New Alter form will unfold under the button, and fold back up again once the form has been submitted.

Alter name, pronouns, status

The most interesting component here is the status, which is currently set to a hardcoded list of "active", "dormant", and "unknown". However, I envision this to be a customisable list where I can add new statuses to the list from a settings menu (yet to be implemented).

Alter image

I wanted the folder that contained alter images and other assets to be outside of my Laravel project, in the Pictures folder of my operating system. I wanted to do this so that I can back up the assets folder whenever I back up my Pictures folder lol (not for adding/deleting the files - this all happens through the app to maintain data integrity!). However, I learned that Laravel does not support that and it will not be able to see my files because they are external. I found a workaround by using symbolic links (symlinks) 🔗. Basically, they allow to have one folder of identical contents in more than one place. I ran "mklink /D [external path] [internal path]" to create the symlink between my Pictures folder and Laravel's internal assets folder, so that any files that I add to my Pictures folder automatically copy over to Laravel's folder. I changed a couple lines in filesystems.php to point to the symlinked folder:

And I was also getting a "404 file not found" error - I think the issue was because the port wasn't originally specified. I changed the base app URL to the localhost IP address in .env:

…And after all this messing around, it works!

(My Pictures folder)

(My Laravel storage)

(And here is Alice's photo displayed - dw I DO know Ibuki's actual name)

Alter description and history

The description and history fields support HTML, so I can format these fields however I like, and add custom features like tables and bullet point lists.

This is done by using blade's HTML preservation tags "{!! !!}" as opposed to the plain text tags "{{ }}".

(Here I define Alice's description contents)

(And here I insert them into the template)

Traits, likes, dislikes, front triggers

These are saved as separate lists and rendered as fun badges. These will be used in the Front Decider (anyone has a better name for it?? 🤔) tool to help me identify which alter "I" am as it's a big struggle for us. Front Decider will work similar to FlowCharty.

What next?

There's lots more things I want to do with SysNotes! But I will take it one step at a time - here is the plan for the next devlog:

Setting up database tables for the profile data

Adding the "New Profile" form so I can create alters from within the app

Adding ability to edit each field on the profile

I tried my best to explain my work process in a way that wold somewhat make sense to non-coders - if you have any feedback for the future format of these devlogs, let me know!

~~~~~~~~~~~~~~~~~~

Disclaimers:

I have not used AI in the making of this app and I do NOT support the Vibe Coding mind virus that is currently on the loose. Programming is a form of art, and I will defend manual coding until the day I die.

Any alter data found in the screenshots is dummy data that does not represent our actual system.

I will not be making the code publicly available until it is a bit more fleshed out, this so far is just a trial for a concept I had bouncing around my head over the weekend.

We are SYSCOURSE NEUTRAL! Please don't start fights under this post

[mltshphq]

BRB... just upgrading Python

CW: nerdy, technical details.

Originally, MLTSHP (well, MLKSHK back then) was developed for Python 2. That was fine for 2010, but 15 years later, and Python 2 is now pretty ancient and unsupported. January 1st, 2020 was the official sunset for Python 2, and 5 years later, we’re still running things with it. It’s served us well, but we have to transition to Python 3.

Well, I bit the bullet and started working on that in earnest in 2023. The end of that work resulted in a working version of MLTSHP on Python 3. So, just ship it, right? Well, the upgrade process basically required upgrading all Python dependencies as well. And some (flyingcow, torndb, in particular) were never really official, public packages, so those had to be adopted into MLTSHP and upgraded as well. With all those changes, it required some special handling. Namely, setting up an additional web server that could be tested against the production database (unit tests can only go so far).

Here’s what that change comprised: 148 files changed, 1923 insertions, 1725 deletions. Most of those changes were part of the first commit for this branch, made on July 9, 2023 (118 files changed).

But by the end of that July, I took a break from this task - I could tell it wasn’t something I could tackle in my spare time at that time.

Time passes…

Fast forward to late 2024, and I take some time to revisit the Python 3 release work. Making a production web server for the new Python 3 instance was another big update, since I wanted the Docker container OS to be on the latest LTS edition of Ubuntu. For 2023, that was 20.04, but in 2025, it’s 24.04. I also wanted others to be able to test the server, which means the CDN layer would have to be updated to direct traffic to the test server (without affecting general traffic); I went with a client-side cookie that could target the Python 3 canary instance.

In addition to these upgrades, there were others to consider — MySQL, for one. We’ve been running MySQL 5, but version 9 is out. We settled on version 8 for now, but could also upgrade to 8.4… 8.0 is just the version you get for Ubuntu 24.04. RabbitMQ was another server component that was getting behind (3.5.7), so upgrading it to 3.12.1 (latest version for Ubuntu 24.04) seemed proper.

One more thing - our datacenter. We’ve been using Linode’s Fremont region since 2017. It’s been fine, but there are some emerging Linode features that I’ve been wanting. VPC support, for one. And object storage (basically the same as Amazon’s S3, but local, so no egress cost to-from Linode servers). Both were unavailable to Fremont, so I decided to go with their Chicago region for the upgrade.

Now we’re talking… this is now not just a “push a button” release, but a full-fleged, build everything up and tear everything down kind of release that might actually have some downtime (while trying to keep it short)!

I built a release plan document and worked through it. The key to the smooth upgrade I want was to make the cutover as seamless as possible. Picture it: once everything is set up for the new service in Chicago - new database host, new web servers and all, what do we need to do to make the switch almost instant? It’s Fastly, our CDN service.

All traffic to our service runs through Fastly. A request to the site comes in, Fastly routes it to the appropriate host, which in turns speaks to the appropriate database. So, to transition from one datacenter to the other, we need to basically change the hosts Fastly speaks to. Those hosts will already be set to talk to the new database. But that’s a key wrinkle - the new database…

The new database needs the data from the old database. And to make for a seamless transition, it needs to be up to the second in step with the old database. To do that, we have take a copy of the production data and get it up and running on the new database. Then, we need to have some process that will copy any new data to it since the last sync. This sounded a lot like replication to me, but the more I looked at doing it that way, I wasn’t confident I could set that up without bringing the production server down. That’s because any replica needs to start in a synchronized state. You can’t really achieve that with a live database. So, instead, I created my own sync process that would copy new data on a periodic basis as it came in.

Beyond this, we need a proper replication going in the new datacenter. In case the database server goes away unexpectedly, a replica of it allows for faster recovery and some peace of mind. Logical backups can be made from the replica and stored in Linode’s object storage if something really disastrous happens (like tables getting deleted by some intruder or a bad data migration).

I wanted better monitoring, too. We’ve been using Linode’s Longview service and that’s okay and free, but it doesn’t act on anything that might be going wrong. I decided to license M/Monit for this. M/Monit is so lightweight and nice, along with Monit running on each server to keep track of each service needed to operate stuff. Monit can be given instructions on how to self-heal certain things, but also provides alerts if something needs manual attention.

And finally, Linode’s Chicago region supports a proper VPC setup, which allows for all the connectivity between our servers to be totally private to their own subnet. It also means that I was able to set up an additional small Linode instance to serve as a bastion host - a server that can be used for a secure connection to reach the other servers on the private subnet. This is a lot more secure than before… we’ve never had a breach (at least, not to my knowledge), and this makes that even less likely going forward. Remote access via SSH is now unavailable without using the bastion server, so we don’t have to expose our servers to potential future ssh vulnerabilities.

So, to summarize: the MLTSHP Python 3 upgrade grew from a code release to a full stack upgrade, involving touching just about every layer of the backend of MLTSHP.

Here’s a before / after picture of some of the bigger software updates applied (apologies for using images for these tables, but Tumblr doesn’t do tables):

And a summary of infrastructure updates:

I’m pretty happy with how this has turned out. And I learned a lot. I’m a full-stack developer, so I’m familiar with a lot of devops concepts, but actually doing that role is newish to me. I got to learn how to set up a proper secure subnet for our set of hosts, making them more secure than before. I learned more about Fastly configuration, about WireGuard, about MySQL replication, and about deploying a large update to a live site with little to no downtime. A lot of that is due to meticulous release planning and careful execution. The secret for that is to think through each and every step - no matter how small. Document it, and consider the side effects of each. And with each step that could affect the public service, consider the rollback process, just in case it’s needed.

At this time, the server migration is complete and things are running smoothly. Hopefully we won’t need to do everything at once again, but we have a recipe if it comes to that.

[emexotechnologies]

Best Python Training in Marathahalli, Bangalore – Become a Python Expert & Launch a Future-Ready Career!

Want to master Python programming and build a successful IT career? Join eMexo Technologies for the Best Python Training in Marathahalli, Bangalore – your path to becoming a skilled Python developer with job-ready skills and industry certification.

Our Python Certification Course in Marathahalli, Bangalore is designed to equip you with in-demand programming skills, whether you're a beginner or an experienced professional. With real-time projects, hands-on exercises, and expert mentorship, you’ll gain the confidence to build real-world applications and secure your dream job.

🌟 Who Should Join Our Python Course in Marathahalli, Bangalore?

This Python Course in Marathahalli, Bangalore is ideal for:

Students and freshers looking to start their programming career

Software developers and IT professionals upskilling in Python

Data analysts and automation testers using Python for scripting

Anyone looking to crack technical interviews or get Python certified

📘 What You’ll Learn in Our Python Certification Course Marathahalli, Bangalore:

Core Python Programming: Variables, data types, loops, functions, OOP concepts

Advanced Python Concepts: File handling, exception handling, modules, decorators

Web Development with Python: Introduction to Django/Flask frameworks

Database Integration: Using Python with MySQL and SQLite

Automation & Scripting: Build scripts for real-time problem-solving

Live Projects: Real-world applications like calculators, dashboards, and web apps

🚀 Why Choose eMexo Technologies for Python Training in Marathahalli, Bangalore?

We are more than just a Python Training Center in Marathahalli, Bangalore – we are your learning partner. Our focus is on providing career-oriented Python training through certified instructors, hands-on practice, and real-time case studies.

What Makes Us the Best Python Training Institute in Marathahalli, Bangalore:

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Students & fresh graduates planning to enter the IT sector

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🚀 Limited Seats Available – Enroll Today and Start Your Python Journey!

🔖 Hashtags:

[attitudetallyacademy]

Master Web Development & Programming – Build Websites Like a Pro!

Learn Web Development & Programming and kickstart your journey in the tech world! This course covers everything from front-end design to back-end development, equipping you with the latest industry-relevant skills needed to build dynamic and responsive websites.

📌 What You’ll Learn: ✅ HTML, CSS & JavaScript – The foundation of web development ✅ React & Angular – Modern front-end frameworks for dynamic websites ✅ PHP & Node.js – Back-end technologies to power web applications ✅ Database Management – MySQL & MongoDB for efficient data handling ✅ API Integration – Connect and enhance web functionality ✅ Web Security & Performance Optimization – Ensure fast & secure websites

💡 Why Learn Web Development? ✔️ High-demand skill with great career opportunities ✔️ Build websites, web apps, and e-commerce platforms ✔️ Work as a freelancer or with top IT companies

Visit Attitude Academy

📚 Learn web development & programming: Attitude Academy

📍 Visit Us: Yamuna Vihar | Uttam Nagar

📞 Call:

Yamuna Vihar +91 9654382235 | Uttam Nagar +91 9205122267

🌐 Website: www.attitudetallyacademy.com

📩 Email: career@attitudetallyacademy.com

📸 Follow us on: attitudeacademy4u

[dubaiwebsitedesignss]

What Is The Difference Between Web Development & Web Design?

In today’s world, we experience the growing popularity of eCommerce businesses. Web designing and web development are two major sectors for making a difference in eCommerce businesses. But they work together for publishing a website successfully. But what’s the difference between a web designers in Dubai and a web developer?

Directly speaking, web designers design and developers code. But this is a simplified answer. Knowing these two things superficially will not clear your doubt but increase them. Let us delve deep into the concepts, roles and differentiation between web development and website design Abu Dhabi.

What Is Meant By Web Design?

A web design encompasses everything within the oeuvre of a website’s visual aesthetics and utility. This might include colour, theme, layout, scheme, the flow of information and anything related to the visual features that can impact the website user experience.

With the word web design, you can expect all the exterior decorations, including images and layout that one can view on their mobile or laptop screen. This doesn’t concern anything with the hidden mechanism beneath the attractive surface of a website. Some web design tools used by web designers in Dubai which differentiate themselves from web development are as follows:

● Graphic design

● UI designs

● Logo design

● Layout

● Topography

● UX design

● Wireframes and storyboards

● Colour palettes

And anything that can potentially escalate the website’s visual aesthetics. Creating an unparalleled yet straightforward website design Abu Dhabi can fetch you more conversion rates. It can also gift you brand loyalty which is the key to a successful eCommerce business.

What Is Meant By Web Development?

While web design concerns itself with all a website’s visual and exterior factors, web development focuses on the interior and the code. Web developers’ task is to govern all the codes that make a website work. The entire web development programme can be divided into two categories: front and back.

The front end deals with the code determining how the website will show the designs mocked by a designer. While the back end deals entirely with managing the data within the database. Along with it forwarding the data to the front end for display. Some web development tools used by a website design company in Dubai are:

● Javascript/HTML/CSS Preprocessors

● Template design for web

● GitHub and Git

● On-site search engine optimisation

● Frameworks as in Ember, ReactJS or Angular JS

● Programming languages on the server side, including PHP, Python, Java, C#

● Web development frameworks on the server side, including Ruby on Rails, Symfony, .NET

● Database management systems including MySQL, MongoDB, PostgreSQL

Web Designers vs. Web Developers- Differences

You must have become acquainted with the idea of how id web design is different from web development. Some significant points will highlight the job differentiation between web developers and designers.

Generally, Coding Is Not A Cup Of Tea For Web Designers:

Don’t ever ask any web designers in Dubai about their coding knowledge. They merely know anything about coding. All they are concerned about is escalating a website’s visual aspects, making them more eyes catchy.

For this, they might use a visual editor like photoshop to develop images or animation tools and an app prototyping tool such as InVision Studio for designing layouts for the website. And all of these don’t require any coding knowledge.

Web Developers Do Not Work On Visual Assets:

Web developers add functionality to a website with their coding skills. This includes the translation of the designer’s mockups and wireframes into code using Javascript, HTML or CSS. While visual assets are entirely created by designers, developer use codes to implement those colour schemes, fonts and layouts into the web page.

Hiring A Web Developer Is Expensive:

Web developers are more expensive to hire simply because of the demand and supply ratio. Web designers are readily available as their job is much simpler. Their job doesn’t require the learning of coding. Coding is undoubtedly a highly sought-after skill that everyone can’t entertain.

Final Thoughts:

So if you look forward to creating a website, you might become confused. This is because you don’t know whether to opt for a web designer or a developer. Well, to create a website, technically, both are required. So you need to search for a website design company that will offer both services and ensure healthy growth for your business.

[digitaldetoxworld]

Structured Query Language (SQL): A Comprehensive Guide

 Structured Query Language, popularly called SQL (reported "ess-que-ell" or sometimes "sequel"), is the same old language used for managing and manipulating relational databases. Developed in the early 1970s by using IBM researchers Donald D. Chamberlin and Raymond F. Boyce, SQL has when you consider that end up the dominant language for database structures round the world.

Structured query language commands with examples

Today, certainly every important relational database control system (RDBMS)—such as MySQL, PostgreSQL, Oracle, SQL Server, and SQLite—uses SQL as its core question language.

What is SQL?

SQL is a website-specific language used to:

Retrieve facts from a database.

Insert, replace, and delete statistics.

Create and modify database structures (tables, indexes, perspectives).

Manage get entry to permissions and security.

Perform data analytics and reporting.

In easy phrases, SQL permits customers to speak with databases to shop and retrieve structured information.

Key Characteristics of SQL

Declarative Language: SQL focuses on what to do, now not the way to do it. For instance, whilst you write SELECT * FROM users, you don’t need to inform SQL the way to fetch the facts—it figures that out.

Standardized: SQL has been standardized through agencies like ANSI and ISO, with maximum database structures enforcing the core language and including their very own extensions.

Relational Model-Based: SQL is designed to work with tables (also called members of the family) in which records is organized in rows and columns.

Core Components of SQL

SQL may be damaged down into numerous predominant categories of instructions, each with unique functions.

1. Data Definition Language (DDL)

DDL commands are used to outline or modify the shape of database gadgets like tables, schemas, indexes, and so forth.

Common DDL commands:

CREATE: To create a brand new table or database.

ALTER:     To modify an present table (add or put off columns).

DROP: To delete a table or database.

TRUNCATE: To delete all rows from a table but preserve its shape.

Example:

sq.

Copy

Edit

CREATE TABLE personnel (

  id INT PRIMARY KEY,

  call VARCHAR(one hundred),

  income DECIMAL(10,2)

);

2. Data Manipulation Language (DML)

DML commands are used for statistics operations which include inserting, updating, or deleting information.

Common DML commands:

SELECT: Retrieve data from one or more tables.

INSERT: Add new records.

UPDATE: Modify existing statistics.

DELETE: Remove information.

Example:

square

Copy

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INSERT INTO employees (id, name, earnings)

VALUES (1, 'Alice Johnson', 75000.00);

three. Data Query Language (DQL)

Some specialists separate SELECT from DML and treat it as its very own category: DQL.

Example:

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SELECT name, income FROM personnel WHERE profits > 60000;

This command retrieves names and salaries of employees earning more than 60,000.

4. Data Control Language (DCL)

DCL instructions cope with permissions and access manage.

Common DCL instructions:

GRANT: Give get right of entry to to users.

REVOKE: Remove access.

Example:

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GRANT SELECT, INSERT ON personnel TO john_doe;

five. Transaction Control Language (TCL)

TCL commands manage transactions to ensure data integrity.

Common TCL instructions:

BEGIN: Start a transaction.

COMMIT: Save changes.

ROLLBACK: Undo changes.

SAVEPOINT: Set a savepoint inside a transaction.

Example:

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BEGIN;

UPDATE personnel SET earnings = income * 1.10;

COMMIT;

SQL Clauses and Syntax Elements

WHERE: Filters rows.

ORDER BY: Sorts effects.

GROUP BY: Groups rows sharing a assets.

HAVING: Filters companies.

JOIN: Combines rows from  or greater tables.

Example with JOIN:

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SELECT personnel.Name, departments.Name

FROM personnel

JOIN departments ON personnel.Dept_id = departments.Identity;

Types of Joins in SQL

INNER JOIN: Returns statistics with matching values in each tables.

LEFT JOIN: Returns all statistics from the left table, and matched statistics from the right.

RIGHT JOIN: Opposite of LEFT JOIN.

FULL JOIN: Returns all records while there is a in shape in either desk.

SELF JOIN: Joins a table to itself.

Subqueries and Nested Queries

A subquery is a query inside any other query.

Example:

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SELECT name FROM employees

WHERE earnings > (SELECT AVG(earnings) FROM personnel);

This reveals employees who earn above common earnings.

Functions in SQL

SQL includes built-in features for acting calculations and formatting:

Aggregate Functions: SUM(), AVG(), COUNT(), MAX(), MIN()

String Functions: UPPER(), LOWER(), CONCAT()

Date Functions: NOW(), CURDATE(), DATEADD()

Conversion Functions: CAST(), CONVERT()

Indexes in SQL

An index is used to hurry up searches.

Example:

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CREATE INDEX idx_name ON employees(call);

Indexes help improve the performance of queries concerning massive information.

Views in SQL

A view is a digital desk created through a question.

Example:

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CREATE VIEW high_earners AS

SELECT call, salary FROM employees WHERE earnings > 80000;

Views are beneficial for:

Security (disguise positive columns)

Simplifying complex queries

Reusability

Normalization in SQL

Normalization is the system of organizing facts to reduce redundancy. It entails breaking a database into multiple related tables and defining overseas keys to link them.

1NF: No repeating groups.

2NF: No partial dependency.

3NF: No transitive dependency.

SQL in Real-World Applications

Web Development: Most web apps use SQL to manipulate customers, periods, orders, and content.

Data Analysis: SQL is extensively used in information analytics systems like Power BI, Tableau, and even Excel (thru Power Query).

Finance and Banking: SQL handles transaction logs, audit trails, and reporting systems.

Healthcare: Managing patient statistics, remedy records, and billing.

Retail: Inventory systems, sales analysis, and consumer statistics.

Government and Research: For storing and querying massive datasets.

Popular SQL Database Systems

MySQL: Open-supply and extensively used in internet apps.

PostgreSQL: Advanced capabilities and standards compliance.

Oracle DB: Commercial, especially scalable, agency-degree.

SQL Server: Microsoft’s relational database.

SQLite: Lightweight, file-based database used in cellular and desktop apps.

Limitations of SQL

SQL can be verbose and complicated for positive operations.

Not perfect for unstructured information (NoSQL databases like MongoDB are better acceptable).

Vendor-unique extensions can reduce portability.

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[nehalpatil]

Crafting Web Applications For Businesses Which are Responsive,Secure and Scalable.

Hello, Readers!

I’m Nehal Patil, a passionate freelance web developer dedicated to building powerful web applications that solve real-world problems. With a strong command over Spring Boot, React.js, Bootstrap, and MySQL, I specialize in crafting web apps that are not only responsive but also secure, scalable, and production-ready.

Why I Started Freelancing

After gaining experience in full-stack development and completing several personal and academic projects, I realized that I enjoy building things that people actually use. Freelancing allows me to work closely with clients, understand their unique challenges, and deliver custom web solutions that drive impact.

What I Do

I build full-fledged web applications from the ground up. Whether it's a startup MVP, a business dashboard, or an e-commerce platform, I ensure every project meets the following standards:

Responsive: Works seamlessly on mobile, tablet, and desktop.

Secure: Built with best practices to prevent common vulnerabilities.

Scalable: Designed to handle growth—be it users, data, or features.

Maintainable: Clean, modular code that’s easy to understand and extend.

My Tech Stack

I work with a powerful tech stack that ensures modern performance and flexibility:

Frontend: React.js + Bootstrap for sleek, dynamic, and responsive UI

Backend: Spring Boot for robust, production-level REST APIs

Database: MySQL for reliable and structured data management

Bonus: Integration, deployment support, and future-proof architecture

What’s Next?

This blog marks the start of my journey to share insights, tutorials, and case studies from my freelance experiences. Whether you're a business owner looking for a web solution or a fellow developer curious about my workflow—I invite you to follow along!

If you're looking for a developer who can turn your idea into a scalable, secure, and responsive web app, feel free to connect with me.

Thanks for reading, and stay tuned!