问题:

How do i select the same day each month for the next 5 years using SQL?

eg:

05 Jan 2013
05 Feb 2013
05 Mar 2013

I have tried:

select dateadd(day,-day(dateadd(month,1,current_timestamp)) , dateadd(month,1,current_timestamp) )

回答1:

How about something like

DECLARE @StartDate DATETIME = '05 Jan 2013',         @YearsAdded INT = 5  ;WITH Dates AS (         SELECT  @StartDate [Date]         UNION ALL         SELECT  DATEADD(MONTH,1,[Date])         FROM    Dates         WHERE   DATEADD(MONTH,1,[Date]) <= DATEADD(YEAR,@YearsAdded,@StartDate) ) SELECT  * FROM    Dates OPTION (MAXRECURSION 0)

SQL Fiddle DEMO

回答2:

This is perfect for a tally table

MONTHLY

--======================================================================================================================== /* tally                                                                                                                */ --========================================================================================================================  ;WITH parms AS (SELECT      YearSpan      = 5      ,DayOfTheMonth = 5 )  ,E1(N) AS (     SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL      SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 )  , Tally(N) AS (     SELECT 0 UNION     SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL))     FROM E1 a, E1 b )  --======================================================================================================================== /* projection                                                                                                           */ --========================================================================================================================  SELECT      ResultDate = DATEADD(mm, DATEDIFF(mm, 0, DATEADD(mm, t.N, GETDATE())), (p.DayOfTheMonth - 1)) FROM parms p CROSS JOIN Tally t WHERE DATEADD(mm, t.N, GETDATE()) < DATEADD(yy, p.YearSpan, GETDATE())

QUARTERLY (uses the same "tally" code block as the MONTHLY so I've omitted the code for it)

--======================================================================================================================== /* tally                                                                                                                */ --========================================================================================================================  -- [code omitted]  --======================================================================================================================== /* projection                                                                                                           */ --========================================================================================================================  SELECT      ResultDate = DATEADD(qq, DATEDIFF(qq, 0, DATEADD(qq, t.N, GETDATE())), (p.DayOfTheMonth - 1)) FROM parms p CROSS JOIN Tally t WHERE DATEADD(qq, t.N, GETDATE()) < DATEADD(yy, p.YearSpan, GETDATE())

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