选择记录与临时表

Question

  

我想用日期序列显示关于月份记录的关税   如果月份没有关税，则显示以前的关税   请参阅快照以获得更多说明

ALTER PROCEDURE [dbo].[Proc_MonthlyReactiveCharge_Report] @Dateset date

AS   SET DATEFIRST 1   开始     DECLARE @Day int     宣布@fromDt日期     DECLARE @endDate日期     DECLARE @finalEndDate日期     DECLARE @currentdate date = GETDATE（）     SET @fromDt = CAST（CONVERT（varchar，DATEPART（YEAR，@ Dateset））+' - '+ CONVERT（varchar，DATEPART（MONTH，@ Dateset））+' - 01'AS date）

SET @endDate = DATEADD(s, -1, DATEADD(mm, DATEDIFF(m, 0, @fromDt) + 1, 0))
IF @endDate >= @currentdate
BEGIN
  SET @finalEndDate = DATEADD(D, -DATEDIFF(D, @currentdate, @endDate) - 1, @endDate);
  SET @Day = FORMAT(@finalEndDate, 'dd')
END
ELSE
  SET @finalEndDate = @endDate
SET @Day = FORMAT(@finalEndDate, 'dd')
SET NOCOUNT ON;

PRINT @fromDt;
PRINT @finalEndDate;
IF 1 = 0
BEGIN
  SET FMTONLY OFF
END
IF 1 = 0
BEGIN
  SET FMTONLY OFF
END
CREATE TABLE #TestTable2 (
  tempdate date
);

BEGIN
  DECLARE @VarDate datetime = CONVERT(date, @FromDt)
  WHILE @VarDate <= CONVERT(varchar, @finalEndDate)
  BEGIN

    INSERT INTO #TestTable2 (tempdate)
      VALUES (@VarDate)
    SET @VarDate = DATEADD(DAY, 1, @VarDate)
  END
  BEGIN
    WITH tarifReactivelow
    AS (SELECT
      b.tariffrate AS TRL,
      b.EFFECTIVEFROMDATE AS TRLeffectivefrmdate,
      b.effectivetodate AS TRLeffectivetodate,
      a.tempdate
    FROM (SELECT
      *
    FROM #TestTable2) a
    RIGHT JOIN T_EMS_REVENUE_TARIFFDETAILS b
      ON b.TARIFFTYPE = 10
      AND b.REACTIVECHARGETYPE = 2
      AND (
      (a.tempdate BETWEEN CONVERT(date, EFFECTIVEFROMDATE) AND CONVERT(date, EFFECTIVETODATE))
      OR (a.tempdate BETWEEN CONVERT(date, EFFECTIVEFROMDATE) AND CONVERT(date, EFFECTIVETODATE)
      OR CONVERT(date, EFFECTIVEFROMDATE) <= a.tempdate)

      ))
    SELECT
      *
    FROM tarifReactivelow
  END
  DROP TABLE #TestTable2
END

END

Answer 1

您可以使用tempdate和outer apply()

选择小于或等于top 1的最新行

类似的东西：

select *
from #testtable2 as tt
  outer apply (
    select top 1 td.*
    from t_ems_revenue_tariffdetails as td
    where td.tarifftype=10
      and td.reactivechargetype=2
      and td.effectivefromdate<=tt.tempdate
    order by td.effectivefromdate desc
  ) x

Bad habits to kick : using table aliases like (a, b, c) or (t1, t2, t3) - Aaron Bertrand