mysql存储过程之返回多个值的方法示例

本文实例讲述了mysql存储过程之返回多个值的方法。分享给大家供大家参考，具体如下：

mysql存储函数只返回一个值。要开发返回多个值的存储过程，需要使用带有INOUT或OUT参数的存储过程。咱们先来看一个orders表它的结构：

mysql> desc orders;+----------------+-------------+------+-----+---------+-------+| Field     | Type    | Null | Key | Default | Extra |+----------------+-------------+------+-----+---------+-------+| orderNumber  | int(11)   | NO  | PRI | NULL  |    || orderDate   | date    | NO  |   | NULL  |    || requiredDate  | date    | NO  |   | NULL  |    || shippedDate  | date    | YES |   | NULL  |    || status     | varchar(15) | NO  |   | NULL  |    || comments    | text    | YES |   | NULL  |    || customerNumber | int(11)   | NO  | MUL | NULL  |    |+----------------+-------------+------+-----+---------+-------+7 rows in set

DELIMITER $$CREATE PROCEDURE get_order_by_cust( IN cust_no INT, OUT shipped INT, OUT canceled INT, OUT resolved INT, OUT disputed INT)BEGIN -- shipped SELECT      count(*) INTO shipped    FROM      orders    WHERE      customerNumber = cust_no        AND status = 'Shipped'; -- canceled SELECT      count(*) INTO canceled    FROM      orders    WHERE      customerNumber = cust_no        AND status = 'Canceled'; -- resolved SELECT      count(*) INTO resolved    FROM      orders    WHERE      customerNumber = cust_no        AND status = 'Resolved'; -- disputed SELECT      count(*) INTO disputed    FROM      orders    WHERE      customerNumber = cust_no        AND status = 'Disputed';END

+----------+-----------+-----------+-----------+| @shipped | @canceled | @resolved | @disputed |+----------+-----------+-----------+-----------+|    22 |     0 |     1 |     1 |+----------+-----------+-----------+-----------+1 row in set

<?php/** * Call stored procedure that return multiple values * @param $customerNumber */function call_sp($customerNumber){  try {    $pdo = new PDO("mysql:host=localhost;dbname=yiibaidb", 'root', '123456');    // execute the stored procedure    $sql = 'CALL get_order_by_cust(:no,@shipped,@canceled,@resolved,@disputed)';    $stmt = $pdo->prepare($sql);    $stmt->bindParam(':no', $customerNumber, PDO::PARAM_INT);    $stmt->execute();    $stmt->closeCursor();    // execute the second query to get values from OUT parameter    $r = $pdo->query("SELECT @shipped,@canceled,@resolved,@disputed")         ->fetch(PDO::FETCH_ASSOC);    if ($r) {      printf('Shipped: %d, Canceled: %d, Resolved: %d, Disputed: %d',        $r['@shipped'],        $r['@canceled'],        $r['@resolved'],        $r['@disputed']);    }  } catch (PDOException $pe) {    die("Error occurred:" . $pe->getMessage());  }}call_sp(141);

好啦，本次分享就到这里了。

更多关于MySQL相关内容感兴趣的读者可查看本站专题：《MySQL存储过程技巧大全》、《MySQL常用函数大汇总》、《MySQL日志操作技巧大全》、《MySQL事务操作技巧汇总》及《MySQL数据库锁相关技巧汇总》

希望本文所述对大家MySQL数据库计有所帮助。

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