Question

我只需要在我的查询中再选择一个日期字段......但它是一个子查询，并且我使用了计数字段...因为它我需要使用GROUP BY子句......但我不能按子查询分组，查询返回错误......

SELECT
X.NROF,
Z.NMGUERFORN,
C.CDCOMPRADO,
C.CDCOORDENA,
E.CDFUP,
count(*)  AS ocorrencias
--(select TOP 1 DTPROGENTR from CMPENL0 C (NOLOCK) where X.NRPEDICOMP = C.NRPEDICOMP AND X.NRITEMPECO = C.NRITEMPECO) AS DTPROGENTR
FROM  CMPCIL0 X (NOLOCK)
inner join CMPCCL0 Y (NOLOCK) on X.NRPEDICOMP  = Y.NRPEDICOMP
inner join CMFRNL0 Z (NOLOCK) on Y.CDFORNECED1 = Z.CDFORNECED1
inner join CMSCPL0 M (NOLOCK) on X.NRSOLICOMP  = M.NRSOLICOMP    AND X.NRITEMSC    = M.NRITEMSC
inner join CMPENL0 N (NOLOCK) on X.NRPEDICOMP  = N.NRPEDICOMP    AND X.NRITEMPECO  = N.NRITEMPECO
inner join CMMATL0 A (NOLOCK) on X.CDMATERIAL  = A.CDMATERIAL
inner join cmcomL0 c (NOLOCK) on c.cdcomprado = y.cdcomprado
LEFT  JOIN AMCSPL0 D (NOLOCK) ON D.SCPE_NRSOLICOMP = X.NRSOLICOMP AND D.SCPE_NRITEMSC=X.NRITEMSC
LEFT  JOIN CMFUPL0 E (NOLOCK) ON E.CDFORNECED1 = Z.CDFORNECED1
LEFT  JOIN CMPFIL0 H ON Z.CDFORNECED1 = H.CDFORNECED1 AND X.NRIDENTIFI = H.NRIDENTIFI and H.DTVALIDADE > Y.DTEFETPECO
LEFT JOIN CMPENL0 F ON (X.NRPEDICOMP = F.NRPEDICOMP AND X.NRITEMPECO = F.NRITEMPECO)
WHERE X.CDSTATUS = 'P' and X.NROF <> 0
group by X.NROF,Z.NMGUERFORN,C.CDCOMPRADO,C.CDCOORDENA,E.CDFUP--,DTPROGENTR
order by 6 desc

评论的部分是我试图包含以选择字段的代码，但它给了我错误..

Answer 1

问题是您在select子查询的where子句中使用别名。别名不能在查询中的同一级别引用。您应该使用完全限定名称，子查询应该类似于：

(select TOP 1 DTPROGENTR from CMPENL0 C (NOLOCK) where X.NRPEDICOMP = CMPENL0.NRPEDICOMP AND X.NRITEMPECO = CMPENL0.NRITEMPECO) AS DTPROGENTR

Answer 2

如果您的sql-server支持公用表表达式，您可以尝试：

;WITH cte AS
(
    SELECT ROW_NUMBER() OVER(PARTITION BY NRPEDICOMP, NRITEMPECO ORDER BY NRPEDICOMP) row_num
    ,DTPROGENTR
    ,NRPEDICOMP
    ,NRITEMPECO 
    FROM CMPENL0 (NOLOCK)
)
SELECT
X.NROF,
Z.NMGUERFORN,
C.CDCOMPRADO,
C.CDCOORDENA,
E.CDFUP,
count(*)  AS ocorrencias
cte.DTPROGENTR
FROM  CMPCIL0 X (NOLOCK)
inner join CMPCCL0 Y (NOLOCK) on X.NRPEDICOMP  = Y.NRPEDICOMP
inner join CMFRNL0 Z (NOLOCK) on Y.CDFORNECED1 = Z.CDFORNECED1
inner join CMSCPL0 M (NOLOCK) on X.NRSOLICOMP  = M.NRSOLICOMP    AND X.NRITEMSC    = M.NRITEMSC
inner join CMPENL0 N (NOLOCK) on X.NRPEDICOMP  = N.NRPEDICOMP    AND X.NRITEMPECO  = N.NRITEMPECO
inner join CMMATL0 A (NOLOCK) on X.CDMATERIAL  = A.CDMATERIAL
inner join cmcomL0 c (NOLOCK) on c.cdcomprado = y.cdcomprado
LEFT  JOIN AMCSPL0 D (NOLOCK) ON D.SCPE_NRSOLICOMP = X.NRSOLICOMP AND D.SCPE_NRITEMSC=X.NRITEMSC
LEFT  JOIN CMFUPL0 E (NOLOCK) ON E.CDFORNECED1 = Z.CDFORNECED1
LEFT  JOIN CMPFIL0 H ON Z.CDFORNECED1 = H.CDFORNECED1 AND X.NRIDENTIFI = H.NRIDENTIFI and H.DTVALIDADE > Y.DTEFETPECO
LEFT JOIN CMPENL0 F ON X.NRPEDICOMP = F.NRPEDICOMP AND X.NRITEMPECO = F.NRITEMPECO
LEFT JOIN cte ON X.NRPEDICOMP = cte.NRPEDICOMP AND X.NRITEMPECO = cte.NRITEMPECO AND cte.row_num = 1
WHERE X.CDSTATUS = 'P' and X.NROF <> 0
group by X.NROF,Z.NMGUERFORN,C.CDCOMPRADO,C.CDCOORDENA,E.CDFUP, cte.DTPROGENTR
order by 6 desc

如何在子查询中使用Clause组

2 个答案: