Learn SQL
📘 Learn SQL – Structured Chapters & Practical Lessons
Chapter 1: Introduction to Databases & SQL
Learn what databases are, why SQL matters, and real-world use cases.
Chapter 2: Setting Up Your Database Environment
Install and configure tools like MySQL and phpMyAdmin.
Chapter 3: Creating & Managing Databases (DDL)
Use SQL commands to create, alter, and drop tables.
Chapter 4: Understanding SQL Data Types
Explore various data types used in SQL.
Chapter 5: Inserting Data into Tables (DML)
Insert meaningful records using SQL INSERT.
Chapter 6: Retrieving Data: SELECT
Use SELECT to fetch data from your tables.
Chapter 7: Filtering Data with WHERE
Use WHERE clause to specify conditions.
Chapter 8: Sorting Data with ORDER BY
Sort your SQL data ascending or descending.
Chapter 9: Limiting Results with LIMIT/TOP
Restrict the number of rows returned.
Chapter 10: Aggregate Functions
Use COUNT, AVG, SUM, MIN, MAX in SQL.
Chapter 11: Grouping Data with GROUP BY & HAVING
Group and filter grouped records.
Chapter 12: Updating Data with UPDATE
Modify existing records.
Chapter 13: Deleting Data with DELETE
Remove records from tables.
Chapter 14: Joining Tables: INNER JOIN
Combine data from multiple tables.
Chapter 15: Left, Right & Full Joins
Master outer joins in SQL.
Chapter 16: Subqueries (Nested Queries)
Use queries inside other queries.
Chapter 17: Modifying Table Structure
Change columns, data types, constraints.
Chapter 18: Understanding & Using Indexes
Optimize queries with indexes.
Chapter 19: Transactions & ACID Properties
Ensure data reliability and integrity.
Chapter 20: Simplifying Queries with Views
Create virtual tables for complex queries.
Chapter 21: Users & Permissions (GRANT, REVOKE)
Control access to your database.
Chapter 22: Advanced Functions & Control Flow
Explore CASE, IF, and complex logic.
Chapter 23: Beyond the Basics
Best practices, tips, and resources.
📘 Additional SQL Resources
SQL Interview Questions
Prepare for interviews with common SQL questions and helpful answers.
Online SQL Test
Take a practice SQL quiz with scoring to evaluate your skills.
Practice Tests & Quiz
More quizzes and practice questions to strengthen your learning.
Interview Tips
Get expert tips and tricks to boost your confidence in SQL interviews.
