DELETE Commands

To delete all the records from a table in mysql we can use TRUNCATE :

Code:

TRUNCATE 'Department'

You can delete a specific parts of records from database using DELETE command with where clause :

Code:

DELETE FROM Department WHERE NumOfStudents< 5

To delete an entire table from the database we use DROP command :

Code:

DROP TABLE Department

We can also add if exists to it :

Code:

DROP TABLE IF EXISTS 'Department';

You can also delete multiable tables in one sentence :

Code:

DROP TABLE 'Department', 'Student', 'Course';

You can use DROP command to delete an index from a table :

Code:

ALTER TABLE 'Department' DROP INDEX 'index_cat_id'

You can use DROP command to delete an database :

Code:

DROP DATABASE myDB

_________________
M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
Mastermind

Posts: 2715
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