Sql delete-klausel

This article is tagged with: Sql delete-klausel and mysql

SQL DELETE-Klausel

Mit DELETE werden einzelne oder mehrere Datensätze gelöscht. Mit WHERE
werden nur bestimmte Datensätez gelöscht.
DELETE FROM suppliers
WHERE
supplier_name = 'Microsoft';

delete from sql

DELETE FROM table_name
/* delete all from the table */

delete and drop in sql

DELETE -
-DML COMMAND
-Delete Rows from the table one by one
-We can use where clause with Delete to delete single row
-Delete is slower than truncate
-ROLLBACK is possible with DELETE
DROP-
-DDL COMMAND
-Delete the entire structure or schema
-We can't use where clause with drop
-Drop is slower than DELETE & TRUNCATE
-ROLLBACK IS NOT POSSIBLE WITH DROP
TRUNCATE-
-DDL COMMAND
-Truncate deletes rows at a one goal
-We can't use where clause with Truncate
-Truncate faster than both DELETE & DROP
-Rollback is not possible with Truncate

This article is tagged with: Sql delete-klausel and mysql