SQLSERVER һЩ¾­µäÎÊÌâ×ܽá

SQLSERVER--һЩ¾­µäÎÊÌâ×ܽá
2007-04-01¡¡01:04:06
 
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/**********************************/
--»ñµÃijһÌìËùÔÚÄêµÄµÚÒ»Ìì
declare @a datetime,@b datetime,@sum int,@num int,@res varchar(20)
select @a='1-6-1968'
select @b='2006-4-8'
select @sum=year(@a)
select @res=ltrim(cast(@sum as varchar(20)))+'-1-1'
print @res
/*********************************/
--»ñµÃijһÌìËùÔÚÔµÄ×îºóÒ»Ìì
declare @a datetime,@b int,@c int,@res varchar(20)
select @a='2569-8-31'
select @b=month(dateadd(month,1,@a))
select @c=year(@a)
select @res=dateadd(day,-1,cast(@c as varchar(5))+'-'+cast(@b as varchar(20))+'-1')
print @res
/*********************************/
--»ñµÃijһÌìËùÔÚÄêµÄ×îºóÒ»Ìì
declare @a datetime,@b int,@res varchar(20)
select @a='2026-1-5'
select @b=year(@a)+1
select @res=dateadd(day,-1,cast(@b as varchar(20))+'-1-1')
print @res
/*********************************/
/*·µ»Øµ±Ç°ÄêµÄ×îºóÒ»Ìì*/
select dateadd(year,datediff(year,'1900-12-31',getdate()),'1900-12-31')
/*·µ»Øµ±ÔµÄ×îºóÒ»Ìì*/
declare @a int,@b int,@c varchar(123)
select @a=datepart(year,dateadd(month,1,getdate()))
select @b=datepart(month,dateadd(month,1,getdate()))
select @c=str(@a)+'-'+ltrim(str(@b))+'-1'
print dateadd(day,datediff(day,'1900-1-1',@c)-1,'1900-1-1')
/*´òÓ¡ËùÓÐ×Öĸ*/
if exists (select name from sysobjects where name='ff' and type='fn')
drop function ff
go
create function ff(@a varchar(20),@b int)
returns varchar(20)
as
begin
  declare @res varchar(20)
  select @res=substring(@a,@b,1)
  return @res
end
--ÏÈд¸öº¯Êý»ñµÃ¶ÔӦλµÄ×Ö·û£¬ÔÙ´òÓ¡
declare @a varchar(20),@i int,@len int
select @a='asdfgh'
select @len=len(@a)
select @i=1
while (@i<@len)
begin
  print dbo.ff(@a,@i)
  select @i=@i+1
end
/******************************************************************/
/******************************************************************************/
/******************************************************************************/