工作中常需要产生某一年的周数、月份,比如按周排计划、按月核算工资……
1、自动产生周数(含每周起始及结束日期)
DECLARE @FirstDateOfYear DATETIME SET @FirstDateOfYear='2017-01-01'; WITH T AS ( SELECT DATEADD(D,NUMBER,@FirstDateOfYear) D FROM MASTER.DBO.SPT_VALUES WHERE [TYPE]='P' AND NUMBER<DATEDIFF(D,@FirstDateOfYear,DATEADD(YY,1,@FirstDateOfYear)) ) SELECT DATEPART(YY,D) '年份',DATEPART(WEEK,D) '周数',CONVERT(VARCHAR,MIN(D),120) '起始日期',CONVERT(VARCHAR,MAX(D),120) '结束日期' FROM T GROUP BY DATEPART(YY,D),DATEPART(WEEK,D)
执行结果:
2、自动产生月份(含每月起始及结束日期)
DECLARE @FirstDateOfYear DATETIME SET @FirstDateOfYear='2017-01-01'; WITH T AS ( SELECT DATEADD(M,NUMBER,@FirstDateOfYear) D FROM MASTER.DBO.SPT_VALUES WHERE [TYPE]='P' AND NUMBER BETWEEN 0 AND 11 ) SELECT DATEPART(YY,D) '年份',DATEPART(MM,D) '月份',CONVERT(VARCHAR(10),D,120) '起始日期', CONVERT(VARCHAR(10),DATEADD(Y,-1,DATEADD(M,1,D)),120) '结束日期' FROM T
执行结果: