Published on 2021-08-14 15:51:45

The TRUNCATE statement deletes all data from a table. This is similar to DELETE with no filter, but, depending on the database software, has certain restrictions and optimizations.

Removing all rows from the Employee table


Using a truncate table is often better than using DELETE TABLE as it ignores all the indexes and triggers and just removes everything.

Delete table is a row-based operation this means that each row is deleted. Truncate table is a data page operation the entire data page is reallocated. If you have a table with a million rows it will be much faster to truncate the table than it would be to use a delete table statement.

Though we can delete specific Rows with DELETE, we cannot TRUNCATE specific rows, we can only TRUNCATE all the records at once. Deleting All rows and then inserting a new record will continue to add the Auto incremented Primary key value from the previously inserted value, whereas in Truncate, the Auto Incremental primary key value will also get reset and starts from 1.

Note that when truncating the table, no foreign keys must be present, otherwise you will get an error.

ATutorialHub Related Guide

Comments (9)

Leave a Comment

Your email address will not be published. Required fields are marked*

User Comments

html tutorial comments

panduranga gupta

2021-07-05 07:03:13

good website for learning and help me a lot

html tutorial comments


2021-09-25 14:58:47

The awsome website i am looking like for a long time, good work atutorialhub team keep doing

html tutorial comments


2021-09-01 15:03:56

Learning a lot from the courses present on atutorialhub. The courses are very well explained. Great experience

html tutorial comments


2021-09-10 15:05:45

It is very helpful to students and easy to learn the concepts

html tutorial comments


2021-09-14 15:06:41

Great job Tutorials are easy to understand Please make use of it

html tutorial comments

Zain Khan

2021-09-18 15:07:23

Great content and customized courses.

html tutorial comments

Rudrakshi Bhatt

2021-09-09 15:08:10

Well structured coursed and explained really well!

html tutorial comments

Pavana Somashekar

2021-09-11 15:09:08

Good platform for beginners and learn a lot on this website

html tutorial comments


2021-09-25 19:35:50

Nice website