Question

I have table called Data_Details and the data looks like:

DateTimeClosed            Datesub            TimeSub
6/20/2011 18:00           5/16/2011          17:13:17
6/20/2011 18:00           5/18/2011          13:45:17
6/1/2011 19:00            5/24/2011          8:30:12

I am trying to get the difference between closed date and sub date in mins.

I wrote something like this:

SELECT  convert(int,convert(Datetime,[DateTimeClosed])-
(convert(Datetime,[Datesub])+convert(datetime,[TimeSub])))*24*60 
FROM dbo.Data_details

It is giving me following error:

Msg 241, Level 16, State 1, Line 2
Conversion failed when converting date and/or time from character string.

Can anyone help me?

Answer 1

This returns time difference in seconds:

select datediff(SECOND,'5/16/2011'+' '+'17:13:17','6/20/2011 18:00')

Sample script:

declare @test as table
(
date1 datetime,
date2 date,
date3 time
)
insert into @test 
values
('6/20/2011 18:00'         ,  '5/16/2011'        ,  '17:13:17')
select Datediff(second,cast (date2 as varchar)+' '+ cast(date3 as varchar),date1) from @test

UPDATE– Using varchars now that OP clarified that they are all varchars:

declare @test as table
(
date1 varchar(50),
date2 varchar(50),
date3 varchar(50)
)
insert into @test 
values
('6/20/2011 18:00'         ,  '5/16/2011'        ,  '17:13:17')
select Datediff(second,cast (date2 +' '+date3 as datetime),cast (date1 as datetime)) from @test