SQL Constraints Explained 🔥 | PRIMARY KEY, UNIQUE, NOT NULL, CHECK, DEFAULT, FOREIGN KEY
SQL Constraints Explained 🔥 | PRIMARY KEY, UNIQUE, NOT NULL, CHECK, DEFAULT, FOREIGN KEY (Part 8)
In this video, we will learn *SQL Constraints* step by step with practical examples.
Constraints help maintain *data integrity and accuracy* in a database.
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⏱️ *Timestamps:*
00:00 Video Recap
00:20 SQL Constraints Introduction
00:33 UNIQUE Constraint
03:52 NOT NULL Constraint
05:25 CHECK Constraint
07:40 DEFAULT Constraint
09:26 PRIMARY KEY
13:09 AUTO INCREMENT
15:57 FOREIGN KEY
19:06 ER Diagram View in MySQL
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📌 *What you will learn:*
UNIQUE constraint (no duplicate values)
NOT NULL constraint (no null values)
CHECK constraint (apply conditions)
DEFAULT constraint (default values)
PRIMARY KEY (unique + not null)
AUTO INCREMENT (automatic id generation)
FOREIGN KEY (table relationships)
ER Diagram in MySQL
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💻 *Tools used:*
MySQL
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🎯 Perfect for:
Beginners
Data Analyst aspirants
MIS / BI roles
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🔔 Follow this series to become job-ready in SQL
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