SQL Basics Cheat Sheet — Quick Reference PDF

Stop Googling basic SQL every time you write a query. This 4-page cheat sheet covers everything a beginner needs to start working with databases immediately.

What's inside:

✦ Core data types (INT, VARCHAR, DATE, NULL...)

✦ SELECT, WHERE, ORDER BY, LIMIT

✦ INSERT, UPDATE, DELETE with warnings

✦ All 4 JOIN types explained with examples

✦ GROUP BY, HAVING, aggregate functions

✦ CREATE TABLE with constraints (PK, NOT NULL, UNIQUE)

✦ Quick-fire keyword reference table

Works with PostgreSQL, MySQL, SQLite, SQL Server.

Perfect for students, developers, and data analysts.