[英]Sum IIF in T-SQL
需要 T-SQL 方面的帮助,我有一个查询来选择当前行并减去前一行。 目标是 IIF 和按日期和班次分组的 SUM 结果。
查询:
DECLARE @timeStart time(4) = '04:00:00';
DECLARE @timeLast time(4) = '14:09:00';
SELECT
IIF(DATEPART(HOUR, Icas.HORA) <= 3, DATEADD(day, - 1, Icas.DATA), Icas.DATA) AS 'Data_Abate',
IIF(Icas.HORA < @timeLast AND Icas.HORA > @timeStart , 1,2) AS Turno
/* Linha 01 */
,SUM(IIF((
Icas.PESO_BALANCA_L1 - COALESCE(LAG(Icas.PESO_BALANCA_L1) OVER (ORDER BY Icas.COD_ICAS), 0)) > 0
AND (Icas.PESO_BALANCA_L1 - COALESCE(LAG(Icas.PESO_BALANCA_L1) OVER ( ORDER BY Icas.COD_ICAS),0)) < 9999999,
(Icas.PESO_BALANCA_L1 - COALESCE(LAG(Icas.PESO_BALANCA_L1) OVER (ORDER BY Icas.COD_ICAS), 0)), 0)) AS 'Linha 01'
FROM VW_ICAS Icas
group by IIF(DATEPART(HOUR, Icas.HORA) <= 3, DATEADD(day, - 1, Icas.DATA), Icas.DATA), IIF(Icas.HORA < @timeLast AND Icas.HORA > @timeStart , 1,2)
显示的错误
Msg 8120, Level 16, State 1, Line 8
A coluna 'VW_ICAS.COD_ICAS' é inválida na lista de seleção porque não está incluída numa função de agregação ou na cláusula GROUP BY.
Msg 4109, Level 15, State 1, Line 8
Não é possível utilizar as funções no modo de janela no contexto de outro agregado ou função em modo de janela.
Msg 4109, Level 15, State 1, Line 3 Windowed functions cannot be used in the context of another windowed function or aggregate.
Msg 8120, Level 16, State 1, Line 1 Column 'VW_ICAS.COD_ICAS' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
示例数据:
COD_ICAS DATA HORA PESO_BALANCA_L1
7006 2019-11-25 13:03:21.0 2653132
7007 2019-11-25 13:04:21.0 2673282
7008 2019-11-25 13:05:21.0 2713632
7009 2019-11-25 13:06:21.0 2732392
7010 2019-11-25 13:07:21.0 2752757
7011 2019-11-25 13:08:21.0 2794297
7012 2019-11-25 13:09:21.0 2813667
7013 2019-11-25 13:10:21.0 2833867
7014 2019-11-25 13:11:21.0 2871702
7015 2019-11-25 13:12:21.0 2891462
7016 2019-11-25 13:13:21.0 2911222
7017 2019-11-25 13:14:21.0 2930557
7018 2019-11-25 13:15:21.0 2951997
7019 2019-11-25 13:16:21.0 2992322
7020 2019-11-25 13:17:21.0 3034242
如果我理解正确,您需要在子查询中执行lag()
:
select Data_Abate, Torno,
sum(case when i.PESO_BALANCA_L1 - coalesce(prev_pb, 0) > 0 and
i.PESO_BALANCA_L1 - coalesce(prev_pb, 0) < 9999999,
then i.PESO_BALANCA_L1 - coalesce(prev_pb, 0)
else 0
end) as Linha_01
FROM (select i.*,
(case when datepart(hour, i.HORA) <= 3 then dateadd(day, - 1, i.DATA) else i.DATA end) AS Data_Abate,
(case when i.HORA < @timeLast and i.HORA > @timeStart , then 1 else 2 end) AS Turno,
lag(i.PESO_BALANCA_L1) over (order by i.COD_ICAS) as prev_pb
from VW_ICAS i
) i
group by data_abate, Torno;
我还强烈建议您使用coalesce()
因为它是标准SQL。 IIF()
经过改造以支持 MS Access 样式的查询。
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