SQL

Avneesh Panwar•Updated 4/29/2026

30 Real-World SQL Queries Examples for Practice

Master SQL queries examples using real datasets, including SQL practice questions, SQL interview queries, and MySQL queries examples. Perfect for beginners who want hands-on learning and job-ready skills....

Understanding OLTP vs OLAP Databases: How SQL Handles Query Optimization

When working with SQL databases, understanding the fundamental differences between OLTP (Online Transaction Processing) and OLAP (Online Analytical Processing) systems is crucial. Both systems serve distinct purposes, and SQL handles query optimization differently in each case....

Understanding HTAP Databases: Bridging Transactions and Analytics

HTAP databases revolutionize data processing by combining transactional and analytical workloads in a single system. This blog explores their architecture, query optimization techniques, performance benefits, and practical SQL examples, helping businesses achieve real-time insights without ETL delays....

OLTP vs. OLAP Databases: Advanced Insights and Query Optimization Techniques

In the rapidly evolving world of database management systems (DBMS), understanding the key differences between OLTP (Online Transaction Processing) and OLAP (Online Analytical Processing) is critical for database administrators, data engineers, and software developers....

The Beginner’s Guide to Normalization and Denormalization in Databases

This blog post demystifies database normalization and denormalization for beginners. You’ll learn why and when to split or combine tables, see detailed explanations of 1NF–5NF and BCNF, and follow along with relatable examples using Indian names....

SQL Joins Explained: A Complete Guide with Examples

Learn about different types of SQL joins, including INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN, CROSS JOIN, and SELF JOIN, with clear explanations and practical examples....

Avneesh Panwar•Updated 4/29/2026

Compiler SQL Online: A Beginner-Friendly Guide to Running SQL Queries Anywhere

Learn how to use a compiler SQL online to write, compile, and test SQL queries instantly without installing any software. This beginner-friendly guide covers online SQL query compilers, MySQL online compiler, SQL Server online compiler, practical examples, and FAQs to help you practice SQL faster and smarter....

Window Functions in SQL – The Ultimate Guide

This blog provides a complete guide to SQL Window Functions, covering essential components like OVER(), PARTITION BY, ORDER BY, and ROWS BETWEEN. It explains popular functions like ROW_NUMBER(), RANK(), LAG(), LEAD(), and SUM() with practical examples, use cases, and tips to help beginners and professionals master SQL analytics....

What to Do When Your MySQL Table Grows Too Wide

Learn how to overcome MySQL’s column and row-size limits with five powerful strategies, including engine tweaks, schema design patterns, and modern JSON/EAV approaches....

Understanding SQL vs MySQL vs PostgreSQL vs MS SQL vs Oracle and Other Popular Databases

This blog provides a comprehensive comparison between SQL and popular relational database systems including MySQL, PostgreSQL, MS SQL Server, Oracle, SQLite, and MariaDB. It explains their differences, use cases, strengths, limitations, and licensing models—helping both beginners and professionals choose the right database for their applications....