Solved

Difference Between Two Dates Stored Procedure SQL

Posted on 2009-05-18
4
472 Views
Last Modified: 2012-05-07
Hi

I am trying to do my first stored procedure in SQL Server Management 2005 Express. I basically want to take two dates from a table of batch numbers and calculate the time span between the two dates. (The dates will be the first and last datetime that the batch number was recorded in table).

I have my code so far, but it does not compile - throwing incorrect syntax error on the line:

set @firstdate = SELECT top 1 datetimecol from Test_01.Table_1 where batchcol = @batchnumber order by datetimecol ASC

Even then I am not sure I am going the correct route. any hints / opinions would be appreciated.

Cheers

Neil Whitley
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:		<Author,,Name>
-- Create date: <Create Date,,>
-- Description:	<Description,,>
-- =============================================
CREATE PROCEDURE TimeDifferenceSecs 
	-- Add the parameters for the stored procedure here
	@batchnumber int = 99, 
	@vessel varchar(50) = "??",
	@firstdate as datetime,
	@lastdate as datetime,
	@difference as datetime
AS
BEGIN
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;
 
    -- Insert statements for procedure here
	set @firstdate = SELECT top 1 datetimecol from Test_01.Table_1 where batchcol = @batchnumber order by datetimecol ASC
 
	set @lastdate = SELECT top 1 datetimecol from Test_01.Table_1 where batchcol = @batchnumber order by datetimecol DES
 
	set @difference = Datediff("s",@firstdate,@lastdate)
 
END
GO

Open in new window

0
Comment
Question by:silchester
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 60

Accepted Solution

by:
chapmandew earned 500 total points
ID: 24412553
i would do this instead

select datediff(s, min(datetimecol), max(datetimecol))
from test_01.dbo.table_1
where batchcol = @batchcol
0
 

Author Comment

by:silchester
ID: 24412770
Cheers :-) But a stupid question now is how the hell do I run this and see results? I have executed it but there are no results to be seen; I have set SQL to output results to grid, but do not even see a grid?

Sorry for the stupid question.

Neil
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 24412795
you'll need to call the procedure and pass parameters to it.

http://www.sql-server-performance.com/articles/dba/stored_procedures_basics_p1.aspx
0
 

Author Closing Comment

by:silchester
ID: 31582633
Thanks for that - have sorted the results grid query too.
0

Featured Post

Raise the IQ of Your IT Alerts

From IT major incidents to manufacturing line slowdowns, every business process generates insights that need to reach the people required to take action. You need a platform that integrates with your business tools to create fully enabled DevOps toolchains.

You need xMatters.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I'm trying, I really am. But I've seen so many wrong approaches involving date(time) boundaries I despair about my inability to explain it. I've seen quite a few recently that define a non-leap year as 364 days, or 366 days and the list goes on. …
Occasionally there is a need to clean table columns, especially if you have inherited legacy data. There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within…
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

695 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question