Sqlserver sql相关日期格式拼接

SELECT CONVERT(varchar(10), GETDATE(), 111)
select CONVERT(varchar(6) ,getdate(),112)
SELECT CONVERT(varchar(6),dateadd(year, datediff(year, 0, getdate()), 0),112)
SELECT CONVERT(varchar(6),DATEADD(m,1 ,dateadd(dd,-day(getdate())+1,getdate())) ,112)

SELECT CONVERT(varchar(100), GETDATE(), 111)

select CONVERT(varchar(10),dateadd(dd,-day(getdate())+1,getdate()),111) --月第一天
select CONVERT(DATE ,dateadd(dd,-day(getdate())+1,getdate()),111) --月第一天
SELECT CONVERT(varchar(10),dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0)), 111) --月最后一天
SELECT CONVERT(DATE ,dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0)), 111) --月最后一天
select CONVERT(varchar(10),dateadd(year, datediff(year, 0, getdate()), 0),111) --年第一天
select CONVERT(DATE ,dateadd(year, datediff(year, 0, getdate()), 0),111) --年第一天
select CONVERT(varchar(10),dateadd(year, datediff(year, 0, dateadd(year, 1, getdate())), -1),111) --年最后一天

--下个月第一天:
select CONVERT(varchar(10),DATEADD(m,1 ,dateadd(dd,-day(getdate())+1,getdate())) ,111)
select CONVERT(DATE,DATEADD(m,1 ,dateadd(dd,-day(getdate())+1,getdate())) ,111)
--下个月最后一天:
SELECT convert(varchar(10),dateadd(d,-1,dateadd(m,1,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0))),111)
SELECT convert(DATE,dateadd(d,-1,dateadd(m,1,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0))),111)

--2020/05/01-2020/05/31
select CONVERT(varchar(10),dateadd(dd,-day(getdate())+1,getdate()),111) +'-'+ CONVERT(varchar(10),dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0)), 111)
--2020/01/01-2020/05/31
SELECT CONVERT(varchar(10),dateadd(year, datediff(year, 0, getdate()), 0),111) +'-'+ CONVERT(varchar(10),dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0)), 111)
--2020/06/01-2020/06/30
select CONVERT(varchar(10),DATEADD(m,1 ,dateadd(dd,-day(getdate())+1,getdate())) ,111) +'-'+ CONVERT(varchar(10),dateadd(d,-1,dateadd(m,1,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0))),111)
--2020/01/01-2020/06/30
select CONVERT(varchar(10),dateadd(year, datediff(year, 0, getdate()), 0),111) +'-'+ CONVERT(varchar(10),dateadd(d,-1,dateadd(m,1,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0))),111)
--2020/01/01-2020/04/30
SELECT CONVERT(varchar(10),dateadd(year, datediff(year, 0, getdate()), 0),111) +'-'+ CONVERT(varchar(10),dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,getdate()), 0)), 111)