Question

如何从此存储过程中的查询返回行计数？我一直在尝试实现在其他类似的堆栈溢出帖子上找到的解决方案，但每个输出结果都是具有每个单独记录的计数的列。（即，每列输出1,1,1,1,1 ......）

CREATE PROCEDURE stored_proc ()
BEGIN
   SET @start_date = LAST_DAY(NOW() - INTERVAL 2 MONTH) + INTERVAL 1 DAY;
   SET @end_date = LAST_DAY(NOW() - INTERVAL 1 MONTH);

   SELECT users.*, count(DISTINCT mr_rev.id) AS prev_reg
   FROM users
        INNER JOIN gr_user_group
           ON     gr_user_group.user_id = wp_users.ID
              AND gr_user_group.group_id != 22
              AND gr_user_group.group_id = 5
        INNER JOIN usermeta ON users.ID = usermeta.user_id
        INNER JOIN mr_rev
           ON users.ID = mr_rev.users_id AND mr_rev.mr_rev_types_id = 2
        INNER JOIN mr_rev mrr
           ON     users.ID = mrr.users_id
              AND mrr.mr_rev_types_id = 2
              AND mrr.created_on >= @start_date
              AND mrr.created_on <= @end_date
        INNER JOIN mr_revs_meta
           ON     mr_rev.id = mr_revs_meta.mr_rev_id
              AND mr_revs_meta.meta_value > @end_date
              AND mr_revs_meta.created_at < @end_date
   WHERE users.ID NOT IN ('101', '102')
   GROUP BY users.ID
   HAVING prev_reg > 15;
END;

是否有一种有效的方法来返回总行数？

编辑：Return count in Stored Procedure其中一个帖子我未成功实施。

Answer 1

如何将查询包装在另一个选择中：

SELECT COUNT(*) FROM
    (SELECT users.*, count(DISTINCT mr_rev.id) AS prev_reg
       FROM users
            INNER JOIN gr_user_group
               ON     gr_user_group.user_id = wp_users.ID
                  AND gr_user_group.group_id != 22
                  AND gr_user_group.group_id = 5
            INNER JOIN usermeta ON users.ID = usermeta.user_id
            INNER JOIN mr_rev
               ON users.ID = mr_rev.users_id AND mr_rev.mr_rev_types_id = 2
            INNER JOIN mr_rev mrr
               ON     users.ID = mrr.users_id
                  AND mrr.mr_rev_types_id = 2
                  AND mrr.created_on >= @start_date
                  AND mrr.created_on <= @end_date
            INNER JOIN mr_revs_meta
               ON     mr_rev.id = mr_revs_meta.mr_rev_id
                  AND mr_revs_meta.meta_value > @end_date
                  AND mr_revs_meta.created_at < @end_date
       WHERE users.ID NOT IN ('101', '102')
       GROUP BY users.ID
       HAVING prev_reg > 15 ) a;

从MySQL（MariaDB）中的存储过程返回ROW COUNT

1 个答案: