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MySQL存储过程带in和out参数

程序员文章站 2022-06-15 20:37:43
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欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 MySQL存储过程带in和out参数 最简单的例子: [html] mysql DELIMITER $$ mysql USE test $$ Database changed mysql DROP PROCEDURE IF EXISTS `sp_add`$$ Query OK, 0 rows affected (0.00 sec) mysq

欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入

  MySQL存储过程带in和out参数

  最简单的例子:

  [html]

  mysql> DELIMITER $$

  mysql> USE test $$

  Database changed

  mysql> DROP PROCEDURE IF EXISTS `sp_add`$$

  Query OK, 0 rows affected (0.00 sec)

  mysql> CREATE PROCEDURE sp_add(a INT, b INT,OUT c INT)

  -> BEGIN

  -> SET c=a+ b;

  -> END$$

  Query OK, 0 rows affected (0.00 sec)

  mysql> DELIMITER ;

  [html]

  mysql> CALL sp_add (1,2,@c);

  Query OK, 0 rows affected (0.00 sec)

mysql> SELECT @c;

  +------+

  | @c |

  +------+

  | 3 |

  +------+

  1 row in set (0.00 sec)

  一个稍微复杂的例子:

  [html]

  mysql> show create table t_BillNo;

  +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

  | Table | Create Table |

  +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

  | t_BillNo | CREATE TABLE `t_billno` (

  `SaleNo` bigint(20) DEFAULT NULL,

  `bmh` varchar(20) DEFAULT NULL

  ) ENGINE=InnoDB DEFAULT CHARSET=utf8 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=DYNAMIC |

  +----------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

  1 row in set (0.00 sec)

  mysql> select * from t_BillNo;

  +--------+------+

  | SaleNo | bmh |

  +--------+------+

  | 1 | 2 |

  | 4 | 3 |

  | 4 | 5 |

  | 7 | 7 |

  | 12 | 8 |

  +--------+------+

  5 rows in set (0.00 sec)

  mysql>

  mysql> DELIMITER $$

  mysql> USE test $$

  Database changed

  mysql> DROP PROCEDURE IF EXISTS `sp_GetMaxNumber`$$

  Query OK, 0 rows affected (0.01 sec)

  DELIMITER $$

  USE test $$

  DROP PROCEDURE IF EXISTS `sp_GetMaxNumber`$$

  CREATE PROCEDURE sp_GetMaxNumber (IN v_bmh VARCHAR(6), OUT v_MaxNo INT)

  BEGIN

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MySQL存储过程带in和out参数