将SSIS转换更改为SQL查询

我想将下面SSIS包中的transformer更改为SQL查询：

（TYPTRF==“O”？（NUMCPT_ORD==“4000328702”？“005000DY”：（ISNULL（NUMCLI_ORD）；：NUMCLI_ORD））：（NUMCPT_BEN==“4000328702”？（ISNULL（NUMCLI_BEN_BAN）；：NUMCLI_BEN BAN:（ISNULL（NUMCLI_BEN）；：NUMCLI BEN）

请帮帮我。我是SSIS的新手

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谢谢。

你需要很多案例陈述

试试这个

select case when TYPTRF='O' then NUMCPT_ORD='4000328702' else '005000DY' end,
       case when ISNULL(NUMCLI_ORD)='' then 'NUMCLI_ORD' else end,
       case when NUMCPT_BEN ='4000328702' then '' else NUMCLI_BEN_BAN end,
       case when (ISNULL(NUMCLI_BEN)=''  then '' else NUMCLI_BEN end

SQL案例

CASE WHEN TYPTRF = 'O'
THEN CASE WHEN NUMCPT_ORD = '4000328702'
          THEN '005000DY'
          ELSE CASE WHEN NUMCLI_ORD is null
                    THEN ''
                    ELSE NUMCLI_ORD END
            END
ELSE CASE WHEN NUMCPT_BEN = '4000328702'
          THEN CASE WHEN NUMCLI_BEN_BAN is null
                    THEN ''
                    ELSE NUMCLI_BEN_BAN END
          ELSE CASE WHEN NUMCLI_BEN is null
                    THEN ''
                    ELSE NUMCLI_BEN END
          END       
END

已编辑（MS SQL）：

就像加雷斯说的，你可以做这样的事情：

CASE WHEN TYPTRF = 'O'
THEN CASE WHEN NUMCPT_ORD = '4000328702'
          THEN '005000DY'
          ELSE isnull(NUMCLI_ORD, '')
          END  WHEN NUMCPT_BEN = '4000328702'
               THEN isnull(NUMCLI_BEN_BAN,'')
               ELSE isnull(NUMCLI_BEN,'')
               END     

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+1因为它是正确的，但是它比需要的要详细得多。当NUMCLI\u BEN为null时，CASE“ELSE NUMCLI\u BEN END，可以更改为

COALESCE（NUMCLI\u BEN）”，

（或者

为null（NUMCLI\u BEN）”，

，如果是SQL Server，则不需要在[expression]时嵌套CASE语句-

CASE[expression2]时的[result]ELSE CASE然后[result2]ELSE[result3]END

可以简化为[expression]时的[result]ELSE CASE然后[expression2]时的[result2]ELSE[result3]END

CASE WHEN TYPTRF = 'O'
THEN CASE WHEN NUMCPT_ORD = '4000328702'
          THEN '005000DY'
          ELSE isnull(NUMCLI_ORD, '')
          END  WHEN NUMCPT_BEN = '4000328702'
               THEN isnull(NUMCLI_BEN_BAN,'')
               ELSE isnull(NUMCLI_BEN,'')
               END