SQL Day 5 ALTER Command (DDL) in SQL | ALTER Command in SQL Add, Drop & Modify Columns Explained
Boost your SQL skills fast! 💻 In this SQL Day 5 tutorial, you’ll master the ALTER Command (DDL) in SQL — learning how to Add, Drop and Modify columns in existing tables with real-world examples. Perfect for beginners, Data Analysts and Data Scientists preparing for jobs or interviews.
🔑 What you’ll learn in this video:
✅ What the ALTER Command in SQL is & why it’s used
✅ How to ADD new columns to a table
✅ How to MODIFY data types & constraints safely
✅ How to DROP columns without losing critical data
✅ Full syntax + interview examples
📌 Chapters:
00:00 Introduction & Why ALTER Command Matters
00:40 Add a New Column (ALTER TABLE ADD)
01:40 Modify Existing Column (ALTER TABLE MODIFY)
02:33 Drop Column (ALTER TABLE DROP)
💡 Quick Syntax Reference
ALTER TABLE table_name ADD column_name datatype;
ALTER TABLE table_name MODIFY column_name new_datatype;
ALTER TABLE table_name DROP COLUMN column_name;
🎯 By the end you’ll know exactly how to change table structures safely and answer ALTER-command questions in interviews.
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