Dev Brains AI Blog — Regex, SQL & AI Dev Tools Tutorials
Practical tutorials, cheat sheets, and step-by-step guides for developers. Topics cover regular expressions, SQL queries, cron scheduling, JSON handling, and AI-powered tools. All articles are free, practical, and written for real-world use.
50 SQL Queries for Freshers in India
50 essential SQL queries practised in TCS, Infosys, and Wipro technical rounds — with solutions.
Read article →AI Anomaly Detection for Server Logs in Python
Detect unusual patterns in server logs using Python, scikit-learn, and simple statistical models.
Read article →How AI Dev Tools Save Developer Time
Practical examples of AI-powered tools that reduce repetitive tasks for developers.
Read article →AI Microservices Tutorial for Backend Developers
How to build and integrate AI capabilities into a microservices architecture using Python and REST APIs.
Read article →AI Projects for Engineering Students in India
Beginner-friendly AI project ideas for B.Tech and M.Tech students with implementation guidance.
Read article →AI Regex Generator — How to Use Automatic Regex Generation
How an AI regex generator works, how to prompt it for email, phone, date, and custom patterns, and how to test the output.
Read article →Practical AI SQL Use Cases for Developers
Real-world scenarios where AI SQL generation saves time in reporting and data work.
Read article →Base64 Encoding in JavaScript — Examples
How to encode and decode Base64 strings in JavaScript with browser and Node.js examples.
Read article →Base64 vs URL Encoding — What's the Difference?
When to use Base64 vs percent-encoding and how each affects data size and portability.
Read article →Best AI Projects for Final Year B.Tech Students
High-impact final year project ideas using machine learning, NLP, and computer vision.
Read article →Best Free Developer Tools for Indian Programmers
A curated list of the best free tools for Indian developers: IDEs, APIs, deployment, and utilities.
Read article →Common API Errors and How to Fix Them
The most frequent REST API error codes — 400, 401, 403, 404, 429, 500 — with causes and fixes.
Read article →Common SQL Errors and How to Fix Them with AI
The most frequent SQL errors developers encounter and practical AI-assisted fixes for each.
Read article →Cron Expression Complete Guide for Developers
Everything you need to know about cron syntax: fields, special characters, and real-world patterns.
Read article →Cron Expressions for AWS EventBridge and Lambda
Write cron expressions that schedule AWS Lambda functions correctly using EventBridge syntax.
Read article →Cron Jobs in GitHub Actions — Schedule Workflows
How to use cron expressions in GitHub Actions to run workflows on a schedule with examples.
Read article →Cron vs setInterval in Node.js — Which Should You Use?
Compare node-cron and setInterval for task scheduling in Node.js — with code examples and trade-offs.
Read article →Decode JWT Tokens Using Base64 in JavaScript
How JWT tokens use Base64url encoding and how to decode the header and payload in JavaScript.
Read article →Encode Images as Base64 Data URIs in HTML/CSS
Embed images directly in HTML and CSS using Base64 data URIs to avoid extra HTTP requests.
Read article →Fix Invalid JSON Errors in Node.js
Common causes of SyntaxError: Unexpected token in JSON and how to fix them in Node.js.
Read article →Fix Common Node.js Errors — Guide for Beginners in India
Common Node.js errors and step-by-step fixes for beginners: Cannot find module, EACCES, ECONNREFUSED.
Read article →Free MySQL Query Generator Online
How to use a free AI MySQL query generator to build SELECT, JOIN, GROUP BY queries from plain English — no SQL knowledge required.
Read article →How to Debug REST API Errors Using AI
Use AI tools to diagnose REST API errors faster: read error messages, trace requests, and fix issues.
Read article →How to Validate JSON in Python and JavaScript
Validate JSON structure in Python using json.loads and in JavaScript using JSON.parse with error handling.
Read article →JSON Formatter for Indian GST APIs
Format and validate GST API JSON responses — with common field references and formatting tips.
Read article →JSON Schema Generator Tutorial with Examples
Generate a JSON Schema from example JSON and use it for API validation, documentation, and testing.
Read article →MySQL vs PostgreSQL: Performance Comparison
A practical comparison of MySQL and PostgreSQL query performance, feature set, and when to choose each.
Read article →Natural Language to SQL — How AI SQL Generators Work
Learn how natural language to SQL conversion works, how to prompt an AI SQL query builder, and when AI-generated SQL saves time.
Read article →Python AI Projects for Engineering Students in India
Practical Python + AI project ideas for Indian engineering students with links to resources.
Read article →Regex Cheat Sheet for Backend Developers
A concise reference of regex syntax, flags, anchors, quantifiers, and character classes.
Read article →Regex for Aadhaar Card Validation
Validate Aadhaar card numbers using regex — handles 12-digit format and formatting edge cases.
Read article →Regex for Email Validation in JavaScript
How to validate email addresses using regex in JavaScript with edge case handling.
Read article →Regex for GST Number Validation in India
Validate Indian GST identification numbers with a regex pattern and JavaScript example.
Read article →Regex for IFSC Code Validation
Regex patterns to validate Indian bank IFSC codes with JavaScript examples.
Read article →Regex for Indian Phone Number Validation
Regex patterns to validate Indian mobile numbers including +91, 91, and 10-digit formats.
Read article →Regex for Indian PIN Code Validation
Validate 6-digit Indian postal PIN codes using regex in JavaScript and Python.
Read article →Regex for PAN Card Validation
Regex to validate Indian PAN card format with examples in JavaScript and Python.
Read article →Regex for Password Validation Rules
Build strong password validation with regex: length, uppercase, digits, and special characters.
Read article →Top 10 Regex Patterns Every Developer Should Know
The most useful regular expressions for email, URL, phone, date, and IP address matching.
Read article →SQL JOIN Interview Questions with Examples
Common SQL JOIN interview questions with answers and worked examples for MySQL and PostgreSQL.
Read article →SQL Optimization Techniques for Large Tables
Speed up slow SQL queries with indexing, EXPLAIN, query rewriting, and pagination strategies.
Read article →SQL Queries Asked in Accenture & Capgemini Interviews
Frequently asked SQL questions in Accenture, Capgemini, and similar service company interviews.
Read article →SQL Query to Find and Remove Duplicate Records
Step-by-step SQL techniques to detect, count, and delete duplicate rows in MySQL and PostgreSQL.
Read article →SQL Queries for Sales Report Dashboards
Ready-to-use SQL queries for building sales reports: revenue by month, by region, top products.
Read article →SQL Query Generator Tutorial for Beginners
Learn how to use an AI SQL generator to write SELECT, JOIN, GROUP BY, and WHERE queries without remembering syntax.
Read article →Top 10 Cron Schedule Patterns for Developers
The most commonly used cron expressions for daily jobs, hourly tasks, and monthly schedules.
Read article →Top 50 Useful Regex Patterns for Developers
50 practical regex patterns with examples for validation, parsing, and search tasks.
Read article →Top SQL Interview Questions: TCS, Infosys, Wipro
SQL interview prep for IT services companies with questions, expected answers, and query walkthroughs.
Read article →URL Encoding Guide for Web Developers
A complete guide to percent-encoding, when it is required, and common encoding mistakes to avoid.
Read article →URL Encoding for REST API Query Parameters
Why and how to URL-encode query parameters in JavaScript using encodeURIComponent and URLSearchParams.
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