-1

サブクエリを排除する方法があればそれを探しています。

どんなコメントも役に立ちます

SELECT
    [FacilityGroupID]
    ,[LocationGroupID]
    ,[MsrID]
    ,CAST(LEFT([ReportingPeriod],4) + '-' 
                + RIGHT([ReportingPeriod],2)
                + '-01' as datetime) as create_timestamp
    ,SUM([Denominator]) as [Denominator]
    ,SUM([Numerator]) as [Numerator]
FROM
(
    SELECT 
        DISTINCT
        Tob.FacilitygroupId
        ,Tob.LocationgroupId
        ,Tob.Reportingperiod
        ,Tob.Denominator
        ,DimIndicator.MsrId
        ,CASE
            WHEN DimIndicator.MsrID = Tob.MsrId THEN 1
            ELSE 0 
        END as Numerator

    from
        BIReport.dbo.vIndianatest "Tob"
            INNER JOIN [BIreport].[dbo].[DimIndicator] "DimIndicator"
                on Tob.MsrSubGroupId = DimIndicator.MsrSubGroupId
) as "Inner"

GROUP BY
    [FacilityGroupID]
    ,[LocationGroupID]
    ,[MsrID]
    ,CAST(LEFT([ReportingPeriod],4) + '-' 
                + RIGHT([ReportingPeriod],2)
                + '-01' as datetime)

サブクエリと同様に、パフォーマンスが遅すぎます。

ありがとう ！！！

4

1 に答える 1

0

試しましたWITHか？Withインライン ビューへのサブクエリを作成します。

の一般的な使用with:

with clausename AS
(
subquery
)
main query referencing clausename;

例：

-- define with clause
with saletot as
    (
     select dname, sum(sal) as dept_total
     from emp, dept
     where emp.deptno = dept.deptno
     group by dname
    )
-- Main query which use the with clause
   select dname, dept_total
   from saletot        -- Reference to with clause
   order by dept_total desc;
于 2013-01-30T17:27:55.180 に答える