PREPARE stmt_name FROM preparable_stmtEXECUTE stmt_name [USING @var_name [, @var_name] ...] -{DEALLOCATE | DROP} PREPARE stmt_name

mysql> PREPARE pr1 FROM 'SELECT ?+?';Query OK, 0 rows affected (0.01 sec)Statement preparedmysql> SET @a=1, @b=10 ;Query OK, 0 rows affected (0.00 sec)mysql> EXECUTE pr1 USING @a, @b;+------+| ?+? |+------+| 11 |+------+1 row in set (0.00 sec)mysql> EXECUTE pr1 USING 1, 2; -- 只能使用用戶變量傳遞。ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '1, 2' at line 1mysql> DEALLOCATE PREPARE pr1;Query OK, 0 rows affected (0.00 sec)

mysql> CREATE TABLE a (a int);Query OK, 0 rows affected (0.26 sec)mysql> INSERT INTO a SELECT 1;Query OK, 1 row affected (0.04 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> INSERT INTO a SELECT 2;Query OK, 1 row affected (0.04 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> INSERT INTO a SELECT 3;Query OK, 1 row affected (0.04 sec)Records: 1 Duplicates: 0 Warnings: 0mysql> SET @select_test = CONCAT('SELECT * FROM ', @table_name);Query OK, 0 rows affected (0.00 sec)mysql> SET @table_name = 'a';Query OK, 0 rows affected (0.00 sec)mysql> PREPARE pr2 FROM @select_test;Query OK, 0 rows affected (0.00 sec)Statement preparedmysql> EXECUTE pr2 ;+------+| a |+------+| 1 || 2 || 3 |+------+3 rows in set (0.00 sec)mysql> DROP PREPARE pr2; -- 此處DROP可以替代DEALLOCATEQuery OK, 0 rows affected (0.00 sec)