juniorDatabases
Difference between DELETE, TRUNCATE, and DROP.
Updated Apr 28, 2026
Short answer
DELETE removes rows (DML, can be rolled back); TRUNCATE empties a table (DDL); DROP deletes the table structure.
Deep explanation
Deep dive into foundational storage. Understanding how data is stored on disk vs memory. Discussion on the relational model proposed by E.F. Codd.
Real-world example
A library system where books (primary key) are linked to authors (foreign key).
Common mistakes
- Confusing NULL with an empty string.
Follow-up questions
- What is 3NF?