SQL DDL Commands: Create, Alter & Drop
Master DDL commands in SQL. Covers database creation, schema modification, data types, and implementing primary/foreign key constraints.
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SQL DML Commands: Insert, Update & Delete
A complete reference for DML commands. Learn how to safely Insert, Update, and Delete records in your relational database.
SQL DQL Commands: Select, Joins & Subqueries
The ultimate guide to querying databases. Covers simple SELECTs, complex JOINS, Grouping, Aggregation, and advanced Subquery techniques.
ER Diagram to Relational Database Conversion
Learn the rules of mapping ER models to relational schemas. Includes practical SQL code for implementing One-to-One, One-to-Many, and Many-to-Many relationships.