Question

我在应用case时遇到问题..当在sql的where子句中时。当我在where子句中将值放在0和4之间时，我得到了预期的结果，但是当应用case时，它就失败了。

表名：myTbl

data | amount |    date      | ReceiptFrequency

  A     2000     02-03-1988     Annual
  A     2000     02-03-1990     Semiannual
  A     2000     02-03-1991     Annual
  A     2000     02-03-1992     Annual

create TABLE #Table ( num int NOT NULL, );

;WITH Nbrs ( n ) AS (
  SELECT 1 UNION ALL
  SELECT 1 + n FROM Nbrs WHERE n < 60 )
  INSERT #Table(num)
  SELECT n FROM Nbrs
OPTION ( MAXRECURSION 60 )

 SELECT *FROM #Table AS x,#Table AS y,myTbl AS d
    WHERE (d.ReceiptFrequency<>'Random') AND(x.num BETWEEN 0 AND 1(CASE WHEN d.ReceiptFrequency='Annual' THEN 1 WHEN d.ReceiptFrequency='Quarter' THEN 1 WHEN d.ReceiptFrequency='Month' THEN 12 WHEN d.ReceiptFrequency='SemiAnnual' THEN 2 ELSE 1 END -1))

Answer 1

为什么 -1 在CASE..WHEN结尾？

CASE WHEN d.ReceiptFrequency='Annual' THEN 1 WHEN d.ReceiptFrequency='Quarter' THEN 1 WHEN d.ReceiptFrequency='Month' THEN 12 WHEN d.ReceiptFrequency='SemiAnnual' THEN 2 ELSE 1 END -1))

不在where子句上获取数据

1 个答案: