This section covers all core SQL command types, including DDL for creating database structures, DML for inserting and modifying data, DQL for querying data, TCL for managing transactions, and DCL for controlling user access and security.
This section explains different types of keys and constraints in SQL, including Primary, Unique, Composite, Candidate, and Foreign Keys, and how constraints help maintain data integrity, relationships, and consistency in a database.
This section covers SQL Joins, explaining how to combine data from multiple tables using INNER, LEFT, RIGHT, and FULL OUTER joins to retrieve meaningful and related information.