sql server获取连续年份、月份、日

if exists(select 1 from sysobjects where type=‘TF‘ and name=‘ATPublic_TF_GetSummaryDate‘)
    drop function ATPublic_TF_GetSummaryDate
go
create function ATPublic_TF_GetSummaryDate
(
    @calltype varchar(1)=‘‘,    --0:年 1:月    1:日
    @startdate DATE,            --开始日期
    @enddate DATE                --结束日期
) 
 /*** 
    Author: 
    Create date: 2018-01-18
    Description: 循环返回日期   
    Example: 

***/
RETURNS @retDateValue TABLE (datevalue varchar(32))                                                                               
as    
begin
    if @calltype=‘0‘
    begin
        insert into @retDateValue(datevalue)
        select substring(convert(varchar(32),DATEADD(YEAR,number,@startdate),21),1,4) as yearvalue                                                                              
        from master..spt_values WHERE TYPE = ‘P‘ AND DATEADD(YEAR,number,@startdate) <= @enddate                
    end
    else if @calltype=‘1‘
    begin
        insert into @retDateValue(datevalue)
        select substring(convert(varchar(32),DATEADD(MONTH,number,@startdate),21),1,7) as yearvalue                                                                              
        from master..spt_values WHERE TYPE = ‘P‘ AND DATEADD(MONTH,number,@startdate) < @enddate                
    end
    else if @calltype=‘2‘
    begin
        insert into @retDateValue(datevalue)
        select convert(varchar(32),DATEADD(DAY,number,@startdate),21)+‘ 00:00:00‘ as yearvalue                                                                              
        from master..spt_values WHERE TYPE = ‘P‘ AND DATEADD(DAY,number,@startdate) < @enddate                
    end
    return
end
                                                                        
go

declare @beginDate varchar(32)=‘‘, @endDate varchar(32)=‘‘,@datebefore datetime
select @beginDate=‘2017-01-01‘,@endDate=‘2017-05-31‘
select @datebefore=CONVERT(datetime,@beginDate)
select datevalue   from ATPublic_TF_GetSummaryDate(‘0‘,@beginDate,@endDate)
select datevalue from ATPublic_TF_GetSummaryDate(‘1‘,@beginDate,dateadd(YEAR,1,@datebefore))
select datevalue from ATPublic_TF_GetSummaryDate(‘1‘,@beginDate,dateadd(MONTH,1,@datebefore))
select datevalue from ATPublic_TF_GetSummaryDate(‘2‘,@beginDate,dateadd(MONTH,1,@datebefore))