sql-statement-rename-table.md

title	summary	aliases
RENAME TABLE	TiDB 数据库中 RENAME TABLE 的使用概况。	/docs-cn/dev/sql-statements/sql-statement-rename-table/ /docs-cn/dev/reference/sql/statements/rename-table/

RENAME TABLE

RENAME TABLE 语句用于重命名现有表和视图，支持同时重命名多个表及跨数据库重命名。

语法图

RenameTableStmt ::=
    'RENAME' 'TABLE' TableToTable ( ',' TableToTable )*

TableToTable ::=
    TableName 'TO' TableName

示例

CREATE TABLE t1 (a int);

Query OK, 0 rows affected (0.12 sec)

SHOW TABLES;

+----------------+
| Tables_in_test |
+----------------+
| t1             |
+----------------+
1 row in set (0.00 sec)

RENAME TABLE t1 TO t2;

Query OK, 0 rows affected (0.08 sec)

SHOW TABLES;

+----------------+
| Tables_in_test |
+----------------+
| t2             |
+----------------+
1 row in set (0.00 sec)

以下示例演示了如何跨数据库重命名多个表（假设数据库 db1、db2、db3 和 db4 已存在，表 db1.t1 和 db3.t3 已存在）：

RENAME TABLE db1.t1 To db2.t2, db3.t3 To db4.t4;

Query OK, 0 rows affected (0.08 sec)

USE db1; SHOW TABLES;

Database changed
Empty set (0.00 sec)

USE db2; SHOW TABLES;

Database changed
+---------------+
| Tables_in_db2 |
+---------------+
| t2            |
+---------------+
1 row in set (0.00 sec)

USE db3; SHOW TABLES;

Database changed
Empty set (0.00 sec)

USE db4; SHOW TABLES;

Database changed
+---------------+
| Tables_in_db4 |
+---------------+
| t4            |
+---------------+
1 row in set (0.00 sec)

原子重命名可以确保在交换表时，表始终存在。

CREATE TABLE t1(id int PRIMARY KEY);

Query OK, 0 rows affected (0.04 sec)

CREATE TABLE t1_new(id int PRIMARY KEY, n CHAR(0));

Query OK, 0 rows affected (0.04 sec)

RENAME TABLE t1 TO t1_old, t1_new TO t1;

Query OK, 0 rows affected (0.07 sec)

SHOW CREATE TABLE t1\G

*************************** 1. row ***************************
       Table: t1
Create Table: CREATE TABLE `t1` (
  `id` int NOT NULL,
  `n` char(0) DEFAULT NULL,
  PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin
1 row in set (0.00 sec)

MySQL 兼容性

RENAME TABLE 语句与 MySQL 完全兼容。如发现任何兼容性差异，请尝试 TiDB 支持资源。

另请参阅

• CREATE TABLE
• SHOW TABLES
• ALTER TABLE