mysql获取汇总值

Question

我想询问有关汇总的mysql只获得汇总值，这是我的代码

SELECT tbldept.CodeDept AS Dept,
       SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) AS headcount,
       SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) * 144 AS RegHrsEst,
       CONCAT(ROUND(20), '%') AS TargetOT,
       round(SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) * 144 * 0.2) AS OTHrsBdgt
FROM tbldept
LEFT JOIN tblemp
    ON tbldept.CodeDept = tblemp.CodeDept AND
       tblemp.class = "DIR"
WHERE tbldept.CodeDept != 'FIN' AND
      tbldept.CodeDept != 'HRT' AND
      tbldept.CodeDept != 'ISD'
GROUP BY tbldept.CodeDept with ROLLUP;

汇总查询的结果：

我怎样才能获得汇总值？先谢谢

Answer 1

如果您只想要rollup行，只需使用having：

SELECT tbldept.CodeDept AS Dept,
       SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) AS headcount,
       SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) * 144 AS RegHrsEst,
       CONCAT(ROUND(20), '%') AS TargetOT,
       round(SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) * 144 * 0.2) AS OTHrsBdgt
FROM tbldept
LEFT JOIN tblemp
    ON tbldept.CodeDept = tblemp.CodeDept AND
       tblemp.class = "DIR"
WHERE tbldept.CodeDept != 'FIN' AND
      tbldept.CodeDept != 'HRT' AND
      tbldept.CodeDept != 'ISD'
GROUP BY tbldept.CodeDept with ROLLUP
HAVING Dept IS NULL;

编辑：

having应该有效，检查是否存在其他原因。

或者只使用子查询包装查询：

SELECT *
FROM (
    SELECT tbldept.CodeDept AS Dept,
           SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) AS headcount,
           SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) * 144 AS RegHrsEst,
           CONCAT(ROUND(20), '%') AS TargetOT,
           round(SUM(CASE WHEN tblemp.Status = '1' THEN 1 ELSE 0 END) * 144 * 0.2) AS OTHrsBdgt
    FROM tbldept
    LEFT JOIN tblemp
        ON tbldept.CodeDept = tblemp.CodeDept AND
           tblemp.class = "DIR"
    WHERE tbldept.CodeDept != 'FIN' AND
          tbldept.CodeDept != 'HRT' AND
          tbldept.CodeDept != 'ISD'
    GROUP BY tbldept.CodeDept with ROLLUP
) t
WHERE Dept IS NULL;