| PostgreSQL 7.4.30 Documentation | ||||
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DELETE deletes rows that satisfy the WHERE clause from the specified table. If the WHERE clause is absent, the effect is to delete all rows in the table. The result is a valid, but empty table.
Tip: TRUNCATE is a PostgreSQL extension which provides a faster mechanism to remove all rows from a table.
By default, DELETE will delete rows in the specified table and all its subtables. If you wish to only delete from the specific table mentioned, you must use the ONLY clause.
You must have the DELETE privilege on the table to delete from it, as well as the SELECT privilege for any table whose values are read in the condition.
The name (optionally schema-qualified) of an existing table.
A value expression that returns a value of type boolean that determines the rows which are to be deleted.
On successful completion, a DELETE command returns a command tag of the form
DELETE count
The count is the number of rows deleted. If count is 0, no rows matched the condition (this is not considered an error).