CASE WHEN GROUP BY 返回重复值

Question

我正在使用 SQL Server 2012 并尝试使用 Case When Group By 查询。结果在 ProdType 字段中给我重复的值。我知道这与我的 Group by 子句有关。我的查询是：

    SELECT        


CASE WHEN dbo.tblPayCode.PayCode IN (10,11,12,13,14,15,16,20,21,22,23,24,25,26,30,31,32,33,34,35,36) THEN 'WORK'
     WHEN dbo.tblPayCode.PayCode > 39 AND dbo.tblPayCode.PayCode NOT IN (40,43,57,58,59,67,68,72,75,78,79) THEN 'SVLA'
END AS ProdType,

  dbo.tblJobsWorked.WrkDate, SUM(dbo.tblJobsWorked.Hours) AS TotalHours

FROM            dbo.tblEmployees INNER JOIN
                         dbo.tblJobsWorked ON dbo.tblEmployees.EMP_NUMB = dbo.tblJobsWorked.EMP_NUMB INNER JOIN
                         dbo.tblPayCode ON dbo.tblJobsWorked.PayCode = dbo.tblPayCode.PayCode INNER JOIN
                         dbo.tblCostCenters ON dbo.tblEmployees.CC_ORGN_NUMB = dbo.tblCostCenters.CC_C_NB AND 
                         dbo.tblEmployees.ORGN_DEPT_TYP_C = dbo.tblCostCenters.DEPT_TYP_C AND dbo.tblJobsWorked.CC_RSPB_NUMB = dbo.tblCostCenters.CC_C_NB AND 
                         dbo.tblJobsWorked.RSPB_DEPT_TYP_C = dbo.tblCostCenters.DEPT_TYP_C
GROUP BY 
dbo.tblPayCode.PayCode, dbo.tblJobsWorked.WrkDate 

HAVING     dbo.tblJobsWorked.WrkDate>'2013-04-30'

ORDER BY  dbo.tblJobsWorked.WrkDate

我的成绩是

ProdType    WrkDate TotalHours
WORK    2013-05-01 00:00:00.000 58.70
WORK    2013-05-01 00:00:00.000 5.20
SVLA    2013-05-01 00:00:00.000 8.00
SVLA    2013-05-01 00:00:00.000 8.00
WORK    2013-05-01 00:00:00.000 68.00
WORK    2013-05-01 00:00:00.000 825.40
WORK    2013-05-01 00:00:00.000 8.90
SVLA    2013-05-01 00:00:00.000 21.00
SVLA    2013-05-01 00:00:00.000 8.00
SVLA    2013-05-01 00:00:00.000 8.00
WORK    2013-05-01 00:00:00.000 5.30
SVLA    2013-05-01 00:00:00.000 53.00
SVLA    2013-05-01 00:00:00.000 8.60

我希望在 2013 年 5 月 1 日看到 2 行 'WORK' 和 'SVLA' 及其相应的总时数。非常感谢您的帮助！谢谢

Answer 1

查询首先应用分组，然后才应用 select 列表中的逐行计算。如果您希望将这些行组合在一起，您也可以在 group by 子句中应用相同的 case 表达式。

Answer 2

您应该将 HAVING 条件移动到 WHERE

WHERE dbo.tblJobsWorked.WrkDate>'2013-04-30'

您应该考虑像这样修改您的查询

SELECT ProdType, WrkDate, SUM(Hours) AS TotalHours FROM (
SELECT        
CASE WHEN dbo.tblPayCode.PayCode IN (10,11,12,13,14,15,16,20,21,22,23,24,25,26,30,31,32,33,34,35,36) THEN 'WORK'
     WHEN dbo.tblPayCode.PayCode > 39 AND dbo.tblPayCode.PayCode NOT IN (40,43,57,58,59,67,68,72,75,78,79) THEN 'SVLA'
END AS ProdType,
dbo.tblJobsWorked.WrkDate, 
dbo.tblJobsWorked.Hours

FROM            dbo.tblEmployees INNER JOIN
                         dbo.tblJobsWorked ON dbo.tblEmployees.EMP_NUMB = dbo.tblJobsWorked.EMP_NUMB INNER JOIN
                         dbo.tblPayCode ON dbo.tblJobsWorked.PayCode = dbo.tblPayCode.PayCode INNER JOIN
                         dbo.tblCostCenters ON dbo.tblEmployees.CC_ORGN_NUMB = dbo.tblCostCenters.CC_C_NB AND 
                         dbo.tblEmployees.ORGN_DEPT_TYP_C = dbo.tblCostCenters.DEPT_TYP_C AND dbo.tblJobsWorked.CC_RSPB_NUMB = dbo.tblCostCenters.CC_C_NB AND 
                         dbo.tblJobsWorked.RSPB_DEPT_TYP_C = dbo.tblCostCenters.DEPT_TYP_C

WHERE dbo.tblJobsWorked.WrkDate > '2013-04-30'
ORDER BY  dbo.tblJobsWorked.WrkDate ) xx

GROUP BY ProdType, WrkDate;

CASE WHEN GROUP BY 返回重复值

CASE WHEN GROUP BY Returning Duplicate values

tsql

case

sql-server-2012