Spec-Zone .ru
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DROP [TEMPORARY] TABLE [IF EXISTS]tbl_name
[,tbl_name
] ... [RESTRICT | CASCADE]
DROP
TABLE
removes one or more tables. You must have the DROP
privilege for each table. All table data and the table definition are removed, so be careful with this
statement! If any of the tables named in the argument list do not exist, MySQL returns an error indicating by
name which nonexisting tables it was unable to drop, but it also drops all of the tables in the list that do
exist.
When a table is dropped, user privileges on the table are not automatically dropped. See Section
13.7.1.4, "GRANT
Syntax".
Note that for a partitioned table, DROP TABLE
permanently removes the table definition, all of its partitions, and all of the data which was stored in those
partitions. It also removes the partitioning definition (.par
) file associated
with the dropped table.
Use IF EXISTS
to prevent an error from occurring for tables that do not exist. A
NOTE
is generated for each nonexistent table when using IF
EXISTS
. See Section 13.7.5.41, "SHOW
WARNINGS
Syntax".
RESTRICT
and CASCADE
are permitted to make porting
easier. In MySQL 5.6, they do nothing.
DROP TABLE
automatically commits the current active transaction, unless you
use the TEMPORARY
keyword.
The TEMPORARY
keyword has the following effects:
The statement drops only TEMPORARY
tables.
The statement does not end an ongoing transaction.
No access rights are checked. (A TEMPORARY
table is
visible only to the session that created it, so no check is necessary.)
Using TEMPORARY
is a good way to ensure that you do not accidentally drop a
non-TEMPORARY
table.