GROUP BY Clause
Learn SQL GROUP BY clause with examples for grouping data by columns and using aggregate functions.
SQL examples
SQL INSERT, UPDATE, DELETE – Modify Data in Tables
Learn SQL INSERT, UPDATE, and DELETE statements with examples. Step-by-step guide to add, change, and remove data in SQL tables. Beginner-friendly tutorial.
SQL CREATE, ALTER, DROP – Table & Database
Learn SQL CREATE, ALTER, and DROP statements to create and modify databases and tables. Step-by-step guide with examples for beginners.
SQL Data Types – Complete Beginner’s Guide
Learn all SQL data types with examples. Understand numeric, string, date/time, and special types in Oracle, MySQL, and SQL Server. Step-by-step beginner guide.