Question

我有一个很长的查询，不得不向其中添加两个新的CASE语句-

SELECT nt.COSTCENTER,
s.DAD,
s.DIVISION, 
nt.DISPENSER,
UPPER(nt.TINTERSERIALNBR),
COUNT(*)OVER (PARTITION BY nt.COSTCENTER) AS NumOfDispensers,
nt.CLRNTSYS,
SUM(CASE WHEN
(nt.CLRNTSYS ='CCE' AND (nt.BOOKDATE >= '01-JAN-17' AND nt.BOOKDATE <= '31-DEC-17')) 
THEN nt.GALLONS ELSE 0 END) AS CCEGallons2017,
SUM(CASE WHEN
(nt.CLRNTSYS ='BAC' AND (nt.BOOKDATE >= '01-JAN-17' AND nt.BOOKDATE <= '31-DEC-17'))
THEN nt.GALLONS ELSE 0 END) AS BACGallons2017,
SUM(CASE WHEN
(nt.CLRNTSYS ='CCE' AND (nt.BOOKDATE >= '01-JAN-18' AND nt.BOOKDATE <= '31-DEC-18')) 
THEN nt.GALLONS ELSE 0 END) AS CCEGallons2018,
SUM(CASE WHEN
(nt.CLRNTSYS ='BAC' AND (nt.BOOKDATE >= '01-JAN-18' AND nt.BOOKDATE <= '31-DEC-18'))
THEN nt.GALLONS ELSE 0 END) AS BACGallons2018,
CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2017' THEN 'YES' ELSE 'NO' END DNR2017,
CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2018' THEN 'YES' ELSE 'NO' END DNR2018
FROM MQ_CDS_NETTRAN nt
INNER JOIN MQCCNSTORE s
ON nt.COSTCENTER = s.COSTCENTER
INNER JOIN TINTER_MASTER tm
ON UPPER(nt.TINTERSERIALNBR) = UPPER(tm.SERIALNBR)
WHERE nt.BOOKDATE >= '01-JAN-17'
AND nt.CLRNTSYS IN ('CCE','BAC')
AND nt.TRANCODE = 'DISP'
AND UPPER(nt.DISPENSER) <> 'BYHAND'
AND UPPER(nt.DISPENSER) <> 'STANDALONE'
AND tm.DECOMMDATE IS NULL
GROUP BY nt.COSTCENTER, nt.DISPENSER, UPPER(nt.TINTERSERIALNBR), nt.CLRNTSYS,
s.DAD, s.DIVISION
ORDER BY nt.COSTCENTER, nt.DISPENSER, UPPER(nt.TINTERSERIALNBR), nt.CLRNTSYS;

以下是我添加到查询中的两条CASE行：

CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2017' THEN 'YES' ELSE 'NO' END DNR2017,
CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2018' THEN 'YES' ELSE 'NO' END DNR2018

当我尝试运行查询时，出现“不是按表达式分组”。在添加这两行之前，查询运行得很好。如何最好地纠正这个问题？

Answer 1

由于CASE WHEN不是聚合函数，您需要在group by中添加CASE WHEN。

SELECT nt.COSTCENTER,
    s.DAD,
    s.DIVISION, 
    nt.DISPENSER,
    UPPER(nt.TINTERSERIALNBR),
    COUNT(*)OVER (PARTITION BY nt.COSTCENTER) AS NumOfDispensers,
    nt.CLRNTSYS,
    SUM(CASE WHEN
    (nt.CLRNTSYS ='CCE' AND (nt.BOOKDATE >= '01-JAN-17' AND nt.BOOKDATE <= '31-DEC-17')) 
    THEN nt.GALLONS ELSE 0 END) AS CCEGallons2017,
    SUM(CASE WHEN
    (nt.CLRNTSYS ='BAC' AND (nt.BOOKDATE >= '01-JAN-17' AND nt.BOOKDATE <= '31-DEC-17'))
    THEN nt.GALLONS ELSE 0 END) AS BACGallons2017,
    SUM(CASE WHEN
    (nt.CLRNTSYS ='CCE' AND (nt.BOOKDATE >= '01-JAN-18' AND nt.BOOKDATE <= '31-DEC-18')) 
    THEN nt.GALLONS ELSE 0 END) AS CCEGallons2018,
    SUM(CASE WHEN
    (nt.CLRNTSYS ='BAC' AND (nt.BOOKDATE >= '01-JAN-18' AND nt.BOOKDATE <= '31-DEC-18'))
    THEN nt.GALLONS ELSE 0 END) AS BACGallons2018,
    CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2017' THEN 'YES' ELSE 'NO' END DNR2017,
    CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2018' THEN 'YES' ELSE 'NO' END DNR2018
FROM MQ_CDS_NETTRAN nt
INNER JOIN MQCCNSTORE s ON nt.COSTCENTER = s.COSTCENTER
INNER JOIN TINTER_MASTER tm ON UPPER(nt.TINTERSERIALNBR) = UPPER(tm.SERIALNBR)
WHERE 
        nt.BOOKDATE >= '01-JAN-17'
    AND nt.CLRNTSYS IN ('CCE','BAC')
    AND nt.TRANCODE = 'DISP'
    AND UPPER(nt.DISPENSER) <> 'BYHAND'
    AND UPPER(nt.DISPENSER) <> 'STANDALONE'
    AND tm.DECOMMDATE IS NULL
GROUP BY 
    nt.COSTCENTER, 
    nt.DISPENSER, 
    UPPER(nt.TINTERSERIALNBR),
    nt.CLRNTSYS,
    s.DAD, 
    s.DIVISION,
    CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2017' THEN 'YES' ELSE 'NO' END,
    CASE WHEN to_char(tm.DNRDATE,'YYYY') = '2018' THEN 'YES' ELSE 'NO' END
ORDER BY nt.COSTCENTER, nt.DISPENSER, UPPER(nt.TINTERSERIALNBR), nt.CLRNTSYS;

Oracle SQL-添加CASE语句后“不是按表达式分组”

1 个答案: