Please start any new threads on our new site at http://forums.sqlteam.com. We've got lots of great SQL Server experts to answer whatever question you can come up with.

Our new SQL Server Forums are live! Come on over! We've restricted the ability to create new threads on these forums.

SQL Server Forums
Profile | Active Topics | Members | Search | Forum FAQ
 
Register Now and get your question answered!
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 SQL Server 2005 Forums
 Transact-SQL (2005)
 datetime add datetime
 Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

dalibor
Starting Member

Czech Republic
21 Posts

Posted - 12/17/2012 :  10:42:47  Show Profile  Reply with Quote
Hello,

I have this problem:

DECLARE @hhmmss datetime
DECLARE @dt datetime

SET @hhmmss = {ts '1899-12-31 11:10:00.000'}
SET @dt = {ts '2012-03-12 00:00:00.000'}


select dateadd(s,datediff(s,0,convert(datetime,@hhmmss)),@dt)
select @dt + @hhmmss

--In both cases result is:
2012-03-11 11:10:00.000



I dont understand, why 2012-03-11?
why is not the result 2012-03-12?

I need date(@dt) + time(@hhmmss).
This is 2012-03-12 11:10:00.000.

Please help.

Dalibor

sunitabeck
Flowing Fount of Yak Knowledge

5155 Posts

Posted - 12/17/2012 :  10:54:39  Show Profile  Reply with Quote
This is because unlike for example Excel where the reference date is 12/30/1899, the reference date in SQL Server is 1/1/1900. So use
SET @hhmmss = {ts '1900-01-01 11:10:00.000'}
Go to Top of Page

dalibor
Starting Member

Czech Republic
21 Posts

Posted - 12/17/2012 :  12:16:45  Show Profile  Reply with Quote
I have MS SQL Server 2008 R2 Express, but i need solution for SQL server 2005.
Go to Top of Page

dalibor
Starting Member

Czech Republic
21 Posts

Posted - 12/17/2012 :  12:36:19  Show Profile  Reply with Quote
Yes, i have this solution:

DECLARE @hhmmss datetime
DECLARE @dt datetime
DECLARE @newDatetime datetime
SET @hhmmss = {ts '1899-12-31 11:10:00.000'}
SET @dt = {ts '2012-03-12 00:00:00.000'}

DECLARE @Hour int
DECLARE @Min int

DECLARE @shhmm varchar(20)
SET @Hour = DATEPART(HOUR,@hhmmss)
SET @Min = DATEPART(MINUTE,@hhmmss)

SET @newDatetime = DATEADD(HOUR,@Hour,@dt)
SET @newDatetime = DATEADD(MINUTE,@Min,@newDatetime)
SELECT @newDatetime
Go to Top of Page

madhivanan
Premature Yak Congratulator

India
22864 Posts

Posted - 12/24/2012 :  07:54:07  Show Profile  Send madhivanan a Yahoo! Message  Reply with Quote
Also you don't need ODBC notations


DECLARE @hhmmss datetime
DECLARE @dt datetime

SET @hhmmss = '11:10:00.000'
SET @dt = '2012-03-12 00:00:00.000'


select dateadd(s,datediff(s,0,convert(datetime,@hhmmss)),@dt)
select @dt + @hhmmss



Madhivanan

Failing to plan is Planning to fail
Go to Top of Page

visakh16
Very Important crosS Applying yaK Herder

India
52326 Posts

Posted - 12/24/2012 :  15:34:45  Show Profile  Reply with Quote
quote:
Originally posted by dalibor

Hello,

I have this problem:

DECLARE @hhmmss datetime
DECLARE @dt datetime

SET @hhmmss = {ts '1899-12-31 11:10:00.000'}
SET @dt = {ts '2012-03-12 00:00:00.000'}


select dateadd(s,datediff(s,0,convert(datetime,@hhmmss)),@dt)
select @dt + @hhmmss

--In both cases result is:
2012-03-11 11:10:00.000



I dont understand, why 2012-03-11?
why is not the result 2012-03-12?

I need date(@dt) + time(@hhmmss).
This is 2012-03-12 11:10:00.000.

Please help.

Dalibor


see this to understand how dates are internally stored in sql server

http://visakhm.blogspot.in/2012/07/generate-datetime-values-from-integers.html

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

Go to Top of Page
  Previous Topic Topic Next Topic  
 Reply to Topic
 Printer Friendly
Jump To:
SQL Server Forums © 2000-2009 SQLTeam Publishing, LLC Go To Top Of Page
This page was generated in 0.06 seconds. Powered By: Snitz Forums 2000