如何检查来自Sql的有效日期时间表

Question

我想检查我的当前日期时间是否在两个日期时间之间。

我第一次2016-05-19 04:23:00.000和第二次2016-05-19 04:50:00.000。

如何编写一个查询返回true，如果当前日期时间是第一和第二时间否则返回false之间？

Answer 1

Select * 
From Table 
Where 
    ('2016-05-19 04:23:00.000' <= dateColumn) 
    And (dateColumn < '2016-05-19 04:50:00.000') 

Answer 2

基本情况下的表达式可以很容易地做到这一点。

case when FirstTime <= getdate() AND getdate() <= SecondDate 
    then 'True' 
    else 'False' 
end 

Answer 3

停止，除非你是绝对相信，你知道你在做什么，你ABSOLUTELY了解日期时间概念，日期时间之间使用。

create table #test(
    Id int not null identity(1,1) primary key clustered, 
    ActionDate datetime not null 
) 

insert into #test values 
('2015-12-31 23:59:59.99'), 
('2016-01-01'), 
('2016-01-10'), 
('2016-01-31 23:59:59.99'), 
('2016-02-01') 

select * from #test 
-- all the rows 
1 2015-12-31 23:59:59.990 
2 2016-01-01 00:00:00.000 
3 2016-01-10 00:00:00.000 
4 2016-01-31 23:59:59.990 
5 2016-02-01 00:00:00.000 


-- lets locate all of January 

-- using between 
select * from #test 
where 
    (ActionDate between '2016-01-01' and '2016-01-31') 

2 2016-01-01 00:00:00.000 
3 2016-01-10 00:00:00.000 
-- missing row 4 

select * from #test 
where 
    (ActionDate between '2016-01-01' and '2016-02-01') 

2 2016-01-01 00:00:00.000 
3 2016-01-10 00:00:00.000 
4 2016-01-31 23:59:59.990 
5 2016-02-01 00:00:00.000 -- this is not January 

-- using <and> 
select * from #test 
where 
    ('2016-01-01' <= ActionDate) 
    and (ActionDate < '2016-02-01') 

2 2016-01-01 00:00:00.000 
3 2016-01-10 00:00:00.000 
4 2016-01-31 23:59:59.990 


drop table #test