SQL Server Constraints Explained: Primary Key, Foreign Key, Check & More! | DBMS Tutorials | Part 19

Welcome to Part 19 of the Database Systems series! In this comprehensive tutorial, we bring together everything we've learned about Data Definition Language (DDL) and database integrity. This video is a complete guide to applying all six core table constraints in SQL Server. Whether you prefer clicking through the SSMS interface or writing strict T-SQL scripts, we cover both methods step-by-step. 📌 What you will learn in this lecture: NOT NULL: Forcing a column to accept data. DEFAULT: Automatically filling in missing values. UNIQUE: Preventing duplicate entries in specific columns. PRIMARY KEY: Uniquely identifying every record in a table. FOREIGN KEY: Linking tables and enforcing referential integrity. CHECK: Creating logical rules to validate incoming data.