SQL Where條件的年數

Question

Declare int @NumberofPriorYears=2;
Declare int @currentYear=2014;

SELECT
 *
FROM
MyTable a
WHERE
a.FiscalYear in (

當@NumberofPriorYears為2時，我想傳遞@currentYear-@NumberofPriorYears （即2014、2013、2012），或者當@NumberofPriorYears為null時，傳遞@currentYear即2014。

感謝對此的任何幫助。

Answer 1

嘗試這個

Declare int @numberofyears=2;
Declare int @currentYear=2014;

set @currentYear = datepart(year,getdate())


SELECT
 *
FROM
MyTable a
WHERE
datepart(year,a.FiscalYear) between @currentYear and @currentYear+@numberofYears

Answer 2

SELECT *
FROM MyTable a
WHERE @currentYear - a.FiscalYear <= ISNULL(@numberOfPriorYears, 0)

如果您希望能夠通過上一年而不是僅當年（例如，看到2011-2012而不是2011-2014），則可以使用BETWEEN

WHERE a.FiscalYear BETWEEN @currentYear - ISNULL(@numberOfPriorYears, 0) AND @currentYear

Answer 3

Declare int @numberofyears=2;
Declare int @currentYear=2014;

SELECT *
FROM  MyTable a
WHERE
    ( YEAR(a.FiscalYear) >= YEAR(GETDATE()) -  @numberofyears
      AND 
      @numberofyears IS NOT NULL
    )
OR
 ( YEAR(a.FiscalYear) = YEAR(GETDATE())
    AND 
    @numberofyears IS NULL
  )

Answer 4

你可以使用范圍嗎？

a.FiscalYear >= @currentYear-isnull(@NumberofPriorYears,0)
and a.FiscalYear < @currentYear+1