sql2000 日期时间比较的问题 ( 积分: 31 )

CREATE PROCEDURE pro_outstanding_achievement
(@date1 datetime,@date2 datetime,@all_serve money output,@all_nurse money output,@all_cure money output,@all_goods money output, @all_money money output)
AS
declare @date3 varchar(20)
declare @date4 varchar(20)
set @date3=@date1
set @date4 =@date2+1
set @all_serve=(select isnull(sum(consume_money),0) from serve_note where consume_date >@date3 and consume_date < @date4)
set @all_nurse=(select isnull(sum(consume_money),0) from nurse_note where consume_date >@date3 and consume_date < @date4)
set @all_cure=(select isnull(sum(consume_money),0) from cure_note where consume_date >@date3 and consume_date < @date4)
set @all_goods=(select isnull(sum(consume_money),0) from goods_note where consume_date >@date3 and consume_date < @date4)
set @all_money=@all_serve+@all_nurse+@all_cure+@all_goods
GO
以上代码在日期比较时能得到结果但不准确为什么??????????????????

CREATE PROCEDURE pro_outstanding_achievement
(@date1 datetime,@date2 datetime,@all_serve money output,@all_nurse money output,@all_cure money output,@all_goods money output, @all_money money output)
AS
declare @date3 varchar(20)
declare @date4 varchar(20)
set @date3=@date1
set @date4 =@date2+1
set @all_serve=(select isnull(sum(consume_money),0) from serve_note where consume_date >@date3 and consume_date < @date4)
set @all_nurse=(select isnull(sum(consume_money),0) from nurse_note where consume_date >@date3 and consume_date < @date4)
set @all_cure=(select isnull(sum(consume_money),0) from cure_note where consume_date >@date3 and consume_date < @date4)
set @all_goods=(select isnull(sum(consume_money),0) from goods_note where consume_date >@date3 and consume_date < @date4)
set @all_money=@all_serve+@all_nurse+@all_cure+@all_goods
GO
以上代码在日期比较时能得到结果但不准确为什么??????????????????

估计你的日期字段带“时间”尾巴，所以比较很麻烦的，存入数据是注意格式旧好了

最好不要用》《
用datediff函数吧

你可以用函数，SQL Server日期格式的转换，这个可能给你点帮助。

作者：佚名 文章来源：转载 点击数：815 更新时间：2005-1-8



SQL Server中文版的默认的日期字段datetime格式是yyyy-mm-dd Thh:mm:ss.mmm

例如:

select getdate()

2004-09-12 11:06:08.177

这对于在要不同数据库间转移数据或者习惯oracle日期格式YYYY-MM-DD HH24:MI:SS的人多少有些不方便.

整理了一下SQL Server里面可能经常会用到的日期格式转换方法:

举例如下:

select CONVERT(varchar, getdate(), 120 )
2004-09-12 11:06:08

select replace(replace(replace(CONVERT(varchar, getdate(), 120 ),'-',''),' ',''),':','')
20040912110608

select CONVERT(varchar(12) , getdate(), 111 )
2004/09/12

select CONVERT(varchar(12) , getdate(), 112 )
20040912

select CONVERT(varchar(12) , getdate(), 102 )
2004.09.12

其它我不常用的日期格式转换方法:

select CONVERT(varchar(12) , getdate(), 101 )
09/12/2004

select CONVERT(varchar(12) , getdate(), 103 )
12/09/2004

select CONVERT(varchar(12) , getdate(), 104 )
12.09.2004

select CONVERT(varchar(12) , getdate(), 105 )
12-09-2004

select CONVERT(varchar(12) , getdate(), 106 )
12 09 2004

select CONVERT(varchar(12) , getdate(), 107 )
09 12, 2004

select CONVERT(varchar(12) , getdate(), 108 )
11:06:08

select CONVERT(varchar(12) , getdate(), 109 )
09 12 2004 1

select CONVERT(varchar(12) , getdate(), 110 )
09-12-2004

select CONVERT(varchar(12) , getdate(), 113 )
12 09 2004 1

select CONVERT(varchar(12) , getdate(), 114 )
11:06:08.177

更多的及具体说明请参考SQL Server的联机丛书.

drop procedure my_fid
go

CREATE procedure my_fid
AS
BEGIN
declare @date3 datetime , @date4 datetime
select @date3='2004-12-01'
select @date4='2005-01-01'
select * from acsrecord where datediff(day,ch_time,@date3)<=0 and datediff(day,ch_time,@date4)>=0
END
GO

按天比较应为：
where datediff(day,consume_date,@date3)<=0 and datediff(day,consume_date,@date4)>=0

多人接受答案了。