sql-statement-drop-stats.md

title	summary	aliases
DROP STATS	An overview of the usage of DROP STATS for the TiDB database.	/docs/dev/sql-statements/sql-statement-drop-stats/

DROP STATS

The DROP STATS statement is used to delete the statistics of the selected table from the selected database.

Synopsis

DropStatsStmt ::=
    'DROP' 'STATS' TableName

TableName ::=
    Identifier ('.' Identifier)?

Examples

{{< copyable "sql" >}}

CREATE TABLE t(a INT);

Query OK, 0 rows affected (0.01 sec)

{{< copyable "sql" >}}

SHOW STATS_META WHERE db_name='test' and table_name='t';

+---------+------------+----------------+---------------------+--------------+-----------+
| Db_name | Table_name | Partition_name | Update_time         | Modify_count | Row_count |
+---------+------------+----------------+---------------------+--------------+-----------+
| test    | t          |                | 2020-05-25 20:34:33 |            0 |         0 |
+---------+------------+----------------+---------------------+--------------+-----------+
1 row in set (0.00 sec)

{{< copyable "sql" >}}

DROP STATS t;

Query OK, 0 rows affected (0.00 sec)

{{< copyable "sql" >}}

SHOW STATS_META WHERE db_name='test' and table_name='t';

Empty set (0.00 sec)

MySQL compatibility

This statement is a TiDB extension to MySQL syntax.

See also

• Introduction to Statistics