22.更改表名

RENAME TABLE old_table TO backup_table, new_table TO old_table;
mysql> show tables;
+------------------+
| Tables_in_oldboy |
+------------------+
| test |
+------------------+
1 row in set (0.00 sec)
mysql> rename table test to zhangxuan;
Query OK, 0 rows affected (0.06 sec)
mysql> show tables;
+------------------+
| Tables_in_oldboy |
+------------------+
| zhangxuan |
+------------------+
1 row in set (0.00 sec)
alter 语法：
Syntax:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name | RENAME [TO] new_tbl_name