Question

我的查询将如下所示，我有50个组合（L1，L2，L3 .. L50），具有不同的where子句和不同的列名，

您能否建议我，如何编写简单的方法来实现并缩短处理时间？

L1 A和L1 B colunm名称相同，但L1 C列名称完全不同。与其他级别相似。

Ex：l2 A，L2 B，L2 C，...... L50 A等

 Declare @SQL max set @sql = ' SELECT '+@InputColumn+',

    19 AS [LEVEL],    --- Dynamic column name change
    'L1 A' AS NAME , --- Dynamic column name change
    BP_GEO AS [GEOGRAPHY],
    BP_CTRY AS COUNTRY ,
    BP_DIV AS DIVISION,
    BP_BU AS BUS ,
    BP_BUSINESS AS BU_LC_EC,
    BP_SEG_NEW AS SEGMENT ,
    FROM #Dummy(NOLOCK) 
    WHERE BP_SEG_NEW = GCP_SEG_NEW  --- Dynamic column name change

           UNION ALL

    SELECT    '+@InputColumn+', 

    19 AS [LEVEL],        --- Dynamic column name change
    'L1 B' AS NAME ,      --- Dynamic column name change
    BP_GEO AS [GEOGRAPHY],
    BP_CTRY AS COUNTRY ,
    BP_DIV AS DIVISION,
    BP_BU AS BUS ,
    BP_BUSINESS AS BU_LC_EC,
    BP_SEG_NEW AS SEGMENT,
    FROM #Dummy (NOLOCK) 
    WHERE BP_SEG_NEW <> GCP_SEG_NEW AND GCP_SEG_NEW = 'KUMAR'-- Unable to pass 2 condition in the where

           UNION ALL 

    SELECT    '+@InputColumn+', 
    19 AS [LEVEL],            --- Dynamic column name change
    'L1 C' AS NAME ,          --- Dynamic column name change
    GCP_GEO AS [GEOGRAPHY],   --- Dynamic column name change
    GCP_CTRY AS COUNTRY ,     --- Dynamic column name change
    GCP_DIV AS DIVISION,      --- Dynamic column name change
    GCP_BU AS BUS ,           --- Dynamic column name change
    GCP_BUSINESS AS BU_LC_EC, --- Dynamic column name change
    GCP_SEG_NEW AS SEGMENT,   --- Dynamic column name change
    FROM #Dummy(NOLOCK) 
    WHERE BP_SEG_NEW <> GCP_SEG_NEW --- Dynamic column name change 

    UNION ALL  --- level 20

    SELECT '+@InputColumn+',

    20 AS [LEVEL],    --- Dynamic column name change
    'L2 A' AS NAME , --- Dynamic column name change
    BP_GEO AS [GEOGRAPHY],
    BP_CTRY AS COUNTRY ,
    BP_DIV AS DIVISION,
    BP_BU AS BUS ,
    BP_BUSINESS AS BU_LC_EC,
    BP_SEG_NEW AS SEGMENT ,
    FROM #Dummy(NOLOCK) 
    WHERE Global = GCP_SEG_NEW  --- Dynamic column name change

           UNION ALL

    SELECT    '+@InputColumn+', 

    20 AS [LEVEL],        --- Dynamic column name change
    'L2 B' AS NAME ,      --- Dynamic column name change
    BP_GEO AS [GEOGRAPHY],
    BP_CTRY AS COUNTRY ,
    BP_DIV AS DIVISION,
    BP_BU AS BUS ,
    BP_BUSINESS AS BU_LC_EC,
    BP_SEG_NEW AS SEGMENT,
    FROM #Dummy (NOLOCK) 
    WHERE Global <> GCP_SEG_NEW 
    AND GCP_SEG_NEW = 'KUMAR'-- Unable to pass 2 condition in the where

    UNION ALL 

    SELECT    '+@InputColumn+', 
    20 AS [LEVEL],            --- Dynamic column name change
    'L2 C' AS NAME ,          --- Dynamic column name change
    GCP_GEO AS [GEOGRAPHY],   --- Dynamic column name change
    GCP_CTRY AS COUNTRY ,     --- Dynamic column name change
    GCP_DIV AS DIVISION,      --- Dynamic column name change
    GCP_BU AS BUS ,           --- Dynamic column name change
    GCP_BUSINESS AS BU_LC_EC, --- Dynamic column name change
    GCP_SEG_NEW AS SEGMENT,   --- Dynamic column name change
    FROM #Dummy(NOLOCK) 
    WHERE Global <> GCP_SEG_NEW --- Dynamic column name change 

    EXEC (@sql)

如何在一个select语句中将L1 A，L1 B，L1 C与动态列名和where子句组合？

请参阅示例查询以供参考。

注意：上面的查询只有我给出的一个组合，类似于我有50个组合来编写带有union all的代码。

请帮帮我

由于

where子句和列名称中的动态列名称

0 个答案: