1

我有一个查询可以在 INSERT 语句中使用，但不能单独使用，而且对于我的生活，我无法弄清楚为什么。这是有效的代码：

declare @FY1 char(4)
set @FY1 = (DATEPART(yy,DATEADD(m,-2,GETDATE()) ))
declare @fy char(2)
set @fy = SUBSTRING(@fy1,3,2)
declare @MonthUnits char (2)
set @MonthUnits = datepart(mm, dateadd(mm, -2, getdate()))

create table #tmpJDEnbrunits (mcmcu char(12)
        , NbrUnits float
        , mcdl02 char(40))
insert into #tmpJDEnbrunits
select '000' + ltrim(MCMCU)
, CASE @MonthUnits 
WHEN  1 THEN GBAN01/100 -- January
WHEN  2 THEN GBAN02/100 -- February
WHEN  3 THEN GBAN03/100 -- March
WHEN  4 THEN GBAN04/100 -- April
WHEN  5 THEN GBAN05/100 -- May
WHEN  6 THEN GBAN06/100 -- June
WHEN  7 THEN GBAN07/100 -- July
WHEN  8 THEN GBAN08/100 -- August
WHEN  9 THEN GBAN09/100 -- September
WHEN 10 THEN GBAN10/100 -- October
WHEN 11 THEN GBAN11/100 -- November
WHEN 12 THEN GBAN12/100 -- December
  END
, mcdl02 
from [JDEPSQL1\JDEProd].JDE_PRODUCTION.PRODDTA.F0902, 
[JDEPSQL1\JDEProd].JDE_PRODUCTION.PRODDTA.F0006 
where GBMCU = MCMCU and 
GBFY = @fy and GBLT = 'AU' and
GBOBJ = '9900' and GBSUB = '006' and
MCSTYL in ('R') AND MCMCU<'         999' AND 
MCRP22<>'X'

select * from #tmpJDEnbrunits
where NbrUnits > 0

但是当我尝试使用 CASE 运行 SELECT 以消除临时表时，如下所示：

declare @FY1 char(4)
set @FY1 = (DATEPART(yy,DATEADD(m,-2,GETDATE()) ))
declare @fy char(2)
set @fy = SUBSTRING(@fy1,3,2)
declare @MonthUnits char (2)
set @MonthUnits = datepart(mm, dateadd(mm, -2, getdate()))

select '000' + ltrim(MCMCU)
, CASE @MonthUnits 
    WHEN  1 THEN GBAN01/100 -- January
    WHEN  2 THEN GBAN02/100 -- February
    WHEN  3 THEN GBAN03/100 -- March
    WHEN  4 THEN GBAN04/100 -- April
    WHEN  5 THEN GBAN05/100 -- May
    WHEN  6 THEN GBAN06/100 -- June
    WHEN  7 THEN GBAN07/100 -- July
    WHEN  8 THEN GBAN08/100 -- August
    WHEN  9 THEN GBAN09/100 -- September
    WHEN 10 THEN GBAN10/100 -- October
    WHEN 11 THEN GBAN11/100 -- November
    WHEN 12 THEN GBAN12/100 -- December
  END
, mcdl02 
from [JDEPSQL1\JDEProd].JDE_PRODUCTION.PRODDTA.F0902, 
[JDEPSQL1\JDEProd].JDE_PRODUCTION.PRODDTA.F0006 
where GBMCU = MCMCU and 
GBFY = @fy and GBLT = 'AU' and
GBOBJ = '9900' and GBSUB = '006' and
MCSTYL in ('R') AND MCMCU<'         999' AND 
MCRP22<>'X'

我收到以下错误：

Msg 8180, Level 16, State 1, Line 1 
Statement(s) could not be prepared.
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near 'Qry1043'.
Msg 102, Level 15, State 1, Line 1
Incorrect syntax near 'Qry1016'.
Msg 125, Level 15, State 4, Line 1
Case expressions may only be nested to level 10.

最后一个特别奇怪，因为 CASE 语句没有嵌套。任何帮助将不胜感激，我已经用谷歌搜索了一个小时没有运气！

编辑：从字面上看，似乎认为 WHEN 是嵌套的 CASE 语句。如果我注释掉其中任何两个，它将运行而不会出错。

4

2 回答 2

1

您在这里使用了一些奇怪的自动转换，或者这不是您的实际代码。如果它是您的代码，那么请执行此操作，以便将字符串与字符串（而不是字符串与数字）进行比较：

CASE @MonthUnits 
    WHEN '01' THEN GBAN01/100 -- January
    WHEN '02' THEN GBAN02/100 -- February
    WHEN '03' THEN GBAN03/100 -- March
    WHEN '04' THEN GBAN04/100 -- April
    WHEN '05' THEN GBAN05/100 -- May
    WHEN '06' THEN GBAN06/100 -- June
    WHEN '07' THEN GBAN07/100 -- July
    WHEN '08' THEN GBAN08/100 -- August
    WHEN '09' THEN GBAN09/100 -- September
    WHEN '10' THEN GBAN10/100 -- October
    WHEN '11' THEN GBAN11/100 -- November
    WHEN '12' THEN GBAN12/100 -- December
  END

还要注意，如果你真的想要一个数字，你可以使用内置函数 MONTH

declare @MonthUnits int
set @MonthUnits = month(dateadd(mm, -2, getdate())

在旁边

如果您的代码实际上看起来像这样，我希望看到确切的错误消息：

CASE @MonthUnits 
    CASE WHEN '01' THEN GBAN01/100 -- January
    CASE WHEN '02' THEN GBAN02/100 -- February
    CASE WHEN '03' THEN GBAN03/100 -- March
    CASE WHEN '04' THEN GBAN04/100 -- April
    CASE WHEN '05' THEN GBAN05/100 -- May
    CASE WHEN '06' THEN GBAN06/100 -- June
    CASE WHEN '07' THEN GBAN07/100 -- July
    CASE WHEN '08' THEN GBAN08/100 -- August
    CASE WHEN '09' THEN GBAN09/100 -- September
    CASE WHEN '10' THEN GBAN10/100 -- October
    CASE WHEN '11' THEN GBAN11/100 -- November
    CASE WHEN '12' THEN GBAN12/100 -- December
  END

在这里，您有很多案例语句开始（嵌套）并且没有案例结束语句。

于 2013-09-19T16:53:28.713 回答
1

试试这个代码，

CASE 
    WHEN  @MonthUnits = '1' THEN GBAN01/100 -- January
    WHEN  @MonthUnits = '2' THEN GBAN02/100 -- February
    WHEN  @MonthUnits = '3' THEN GBAN03/100 -- March
    WHEN  @MonthUnits = '4' THEN GBAN04/100 -- April
    WHEN  @MonthUnits = '5' THEN GBAN05/100 -- May
    WHEN  @MonthUnits = '6' THEN GBAN06/100 -- June
    WHEN  @MonthUnits = '7' THEN GBAN07/100 -- July
    WHEN  @MonthUnits = '8' THEN GBAN08/100 -- August
    WHEN  @MonthUnits = '9' THEN GBAN09/100 -- September
    WHEN @MonthUnits = '10' THEN GBAN10/100 -- October
    WHEN @MonthUnits = '11' THEN GBAN11/100 -- November
    WHEN @MonthUnits = '12' THEN GBAN12/100 -- December
  END

您不会得到“Case 表达式只能嵌套到第 10 级”。错误

于 2013-09-19T17:54:49.320 回答