MySQL DELETE statement: Drop, truncate, and delete

Source: Internet
Author: User
Tags mysql delete rollback

Usage:

1. DROP table TB
Drop will delete the table directly, there is no way to retrieve
2, truncate (table) TB
Delete all data in a table and cannot be used with where
3. Delete from TB (where)
Delete data from a table (you can make a row)

The difference between truncate and delete
1, Business: Truncate is not rollback, but delete can be rollback;
Cause: Truncate delete the entire table data (DDL statement, Implicit commit), delete is a row of deletes, you can rollback
2. Effect: Truncate will re-level and index (ID zero-based) after deletion, delete will not delete index
3. Truncate cannot trigger any delete triggers.
4, delete Delete can return the number of rows

MySQL DELETE statement: Drop, truncate, and delete

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