Composite Primary Key in SQL Explained | MySQL Real World Example | SQL Course Part 8

Composite Primary Key in SQL Explained | MySQL Real World Example | SQL Course Part 8

Learn Composite Primary Key in MySQL with a practical hands-on example in this SQL Tutorial for Beginners. In this video, you will understand what a Composite Primary Key is, why it is used, and how multiple columns can be combined to uniquely identify records in a database table.

This SQL Course Part 8 covers the complete concept of Composite Keys in MySQL with real-world examples such as Student Course Enrollment tables. You will also learn the difference between a Primary Key and a Composite Primary Key along with SQL syntax and practical implementation.

Topics Covered:

• What is Composite Primary Key in SQL
• Why Composite Keys are used
• Difference between Primary Key and Composite Primary Key
• Student Course Enrollment Example
• Creating Composite Primary Key in MySQL
• SQL CREATE TABLE with Composite Key
• Inserting Data into Composite Key Table
• Querying Data using SELECT Statement
• Best Practices for Database Design

This video is perfect for beginners, students, developers, database learners, and anyone preparing for SQL interviews and database concepts.

Watch the complete SQL playlist to master MySQL from beginner to advanced level.

Timestamp

00:00 Introduction
00:09 What is Composite Primary Key
00:29 Why Composite Primary Key is Needed
00:47 Student Course Table Example
01:28 Why Single Column Cannot Be Primary Key
01:37 Understanding Composite Keys
02:04 Composite Primary Key Syntax
02:24 Practical Demonstration in MySQL
02:31 Selecting Database
02:52 Creating Student Course Table
03:47 Table Creation Explained
04:24 Understanding Table Structure
04:34 Adding Composite Primary Key
05:01 Creating Composite Key with Roll Number and Course ID
05:31 Fixing SQL Errors
06:31 Successful Table Creation
06:45 Inserting Records into Table
07:04 Using SELECT Statement
07:14 Understanding Output Data
07:40 Composite Primary Key Recap
08:43 Difference Between Primary Key and Composite Primary Key
08:58 Conclusion

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