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sql-statement-truncate.md

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TRUNCATE | TiDB SQL Statement Reference
An overview of the usage of TRUNCATE for the TiDB database.
/docs/dev/sql-statements/sql-statement-truncate/
/docs/dev/reference/sql/statements/truncate/

TRUNCATE

The TRUNCATE statement removes all data from the table in a non-transactional way. TRUNCATE can be thought of as semantically the same as DROP TABLE + CREATE TABLE with the previous definition.

Both TRUNCATE TABLE tableName and TRUNCATE tableName are valid syntax.

Synopsis

TruncateTableStmt ::=
    "TRUNCATE" ( "TABLE" )? TableName

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

Examples

mysql> CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY);
Query OK, 0 rows affected (0.11 sec)

mysql> INSERT INTO t1 VALUES (1),(2),(3),(4),(5);
Query OK, 5 rows affected (0.01 sec)
Records: 5  Duplicates: 0  Warnings: 0

mysql> SELECT * FROM t1;
+---+
| a |
+---+
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
+---+
5 rows in set (0.00 sec)

mysql> TRUNCATE t1;
Query OK, 0 rows affected (0.11 sec)

mysql> SELECT * FROM t1;
Empty set (0.00 sec)

mysql> INSERT INTO t1 VALUES (1),(2),(3),(4),(5);
Query OK, 5 rows affected (0.01 sec)
Records: 5  Duplicates: 0  Warnings: 0

mysql> TRUNCATE TABLE t1;
Query OK, 0 rows affected (0.11 sec)

MySQL compatibility

The TRUNCATE statement in TiDB is fully compatible with MySQL. If you find any compatibility differences, report a bug.

See also