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SQl Display Query

Hi

I have been tasked with the following, We have alot of visitors visiting our company and the company would like some for of Welcome to display on a screen in reception, so what i am doing is collecting data from our CRM software which i will then display onto the monitor.

The query looks like this at the moment

SELECT     dbo.dmactiv.startdate, dbo.dmactiv.starttime, dbo.dmactiv.duration, dbo.dmcont.firstname, dbo.dmcont.lastname, dbo.dmcont.comp_name
FROM         dbo.dmactiv INNER JOIN
                      dbo.dmcont ON dbo.dmactiv.contid = dbo.dmcont.contid

and this output something along the lines of this

Startdate             StartTime         Duration      Firstname     LastName          Comp_Name

2012-04-18                780                    60                joe                bloggs             microsoft


so i deally what i would like to do is half an hour before the arrival the query returns only those that are visiting and once the duration has ended then they no longer are part of the query.


However as you can see from the above data the start Time and duration are produced as whole numbers and i am not sure how to acheive this

Can anybody help

John

Ps sorry for not posting the code properly but all the body functions always seem to be greyed out and i can never add anything not sure why :(
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pepps11976
Asked:
pepps11976
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1 Solution
 
Kevin CrossChief Technology OfficerCommented:
What do the whole numbers represent (e.g., minutes)?
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pepps11976Author Commented:
yes that particular example that i posted above its start time is 13.00 so 780 mins is what it is representing

John
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Kevin CrossChief Technology OfficerCommented:
If it is in minutes, then here is an example of what I may do.
First, the main idea is to generate a start and end DATETIME value from the three columns you have listed.

e.g.,

DECLARE @StartDate DATE = '2012-04-18', @StartTime INT = 780, @Duration INT = 60;
SELECT StartTime = DATEADD(MINUTE, @StartTime-30, CONVERT(DATETIME, @StartDate))
     , EndTime = DATEADD(MINUTE, @StartTime+@Duration, CONVERT(DATETIME, @StartDate))
;

StartTime               EndTime
----------------------- -----------------------
2012-04-18 12:30:00.000 2012-04-18 14:00:00.000

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Note: I subtracted 30 minutes to account for the "half an hour before the arrival" portion of the requirement. Without this, you would get the actual start time, which I believe is 1PM.

Putting this together with your query:

SELECT dbo.dmactiv.startdate, dbo.dmactiv.starttime, dbo.dmactiv.duration
     , dbo.dmcont.firstname, dbo.dmcont.lastname, dbo.dmcont.comp_name
FROM dbo.dmactiv
INNER JOIN dbo.dmcont ON dbo.dmactiv.contid = dbo.dmcont.contid
WHERE CURRENT_TIMESTAMP BETWEEN DATEADD(MINUTE, dbo.dmactiv.starttime-30, CONVERT(DATETIME, dbo.dmactiv.startdate)) AND DATEADD(MINUTE, dbo.dmactiv.starttime+dbo.dmactiv.duration, CONVERT(DATETIME, dbo.dmactiv.startdate))
;

I hope that helps!
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pepps11976Author Commented:
Thats great

i assume with what you posted it gets rid of visits that have gone past there time etc?
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Kevin CrossChief Technology OfficerCommented:
Yes, once the current timestamp greater than the end time of the appointment, the record will no longer show (tested). So, if there query is scheduled it should pick up new visitors and drop off old ones automatically.
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pepps11976Author Commented:
Superb Thanks for your help
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