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home / developersection / forums / difference between delete, truncate, and drop
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Anubhav Sharma
Anubhav Sharma

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The Anubhav portal was launched in March 2015 at the behest of the Hon'ble Prime Minister for retiring government officials to leave a record of their experiences while in Govt service .

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1 Answers

Anubhav Sharma
Anubhav Sharma 19 Mar 2026
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In SQL, the three most commonly used commands for this purpose are:

  • DELETE
  • TRUNCATE
  • DROP

Although all three remove data, they work in very different ways.
Understanding the difference is very important for database developers, DBAs, and interview preparation.

1. DELETE Command

  • DELETE is used to remove rows from a table.
  • It removes data row by row and can use a WHERE condition.

Syntax

DELETE FROM Employees
WHERE Id = 5;

Features

  • Removes selected rows
  • WHERE condition allowed
  • Can be rolled back
  • Fires triggers
  • Slow for large data

Example

DELETE FROM Employees;

This will remove all rows but table structure remains.

2. TRUNCATE Command

  • TRUNCATE removes all rows from a table quickly.
  • It does not remove rows one by one, it removes all data at once.

Syntax

TRUNCATE TABLE Employees;

Features

  • Removes all rows
  • WHERE not allowed
  • Faster than DELETE
  • Cannot be used with condition
  • Resets Identity
  • Cannot be used if FK exists (in most cases)
  • Minimal logging

Example

TRUNCATE TABLE Employees;

Table remains, data removed.

3. DROP Command

  • DROP removes the table completely from the database.
  • Not only data, but also structure is deleted.

Syntax

DROP TABLE Employees;

Features

  • Removes table permanently
  • Removes data + structure
  • Cannot rollback (normally)
  • Fast
  • Frees memory

Example

DROP TABLE Employees;

Table no longer exists.

Main Difference Table

Feature DELETE TRUNCATE DROP
Removes rows Yes Yes Yes
Removes structure No No Yes
WHERE allowed Yes No No
Rollback possible Yes Limited No
Trigger fired Yes No No
Identity reset No Yes Yes
Speed Slow Fast Very Fast
Table exists after command Yes Yes No

When to Use DELETE

Use DELETE when:

  • Need condition
  • Need trigger
  • Need rollback
  • Need partial delete

Example:

DELETE FROM Orders WHERE OrderDate < '2020-01-01';

When to Use TRUNCATE

Use TRUNCATE when:

  • Need to remove all data
  • Want fast operation
  • Want reset identity
  • No foreign key issue

Example:

TRUNCATE TABLE Logs;

When to Use DROP

Use DROP when:

  • Table not needed
  • Want to remove structure
  • Want to free space
  • Recreating table

Example:

DROP TABLE TempData;

Interview Question

Difference between DELETE and TRUNCATE?

Answer:

  • DELETE removes row by row and supports WHERE
  • TRUNCATE removes all rows at once
  • TRUNCATE is faster
  • DELETE can rollback easily
  • TRUNCATE resets identity

Conclusion

DELETE, TRUNCATE, and DROP are very important SQL commands.

  • DELETE → remove selected rows
  • TRUNCATE → remove all rows fast
  • DROP → remove table completely

Every SQL developer must know the difference.

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