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Update using max

Discuss Update using max in the SQL Development forum on ASP Free.
Update using max SQL forums discussing structured query language related questions that are platform independent. Discussions include advanced topics such as joins, stored procedures, and triggers.

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  #1  
Old May 9th, 2008, 06:05 AM
elenton elenton is offline
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Update using max
Hi Im trying to write an update query but i cant get the unique id out so i need to update using the max service date.

Below currently gets all the properties, but i only want to update the one with the max service date as this will be the most recent one, how do i write an update with a max date?

Code:
UPDATE dbo_tbl_service SET dbo_tbl_service.SERVICEDATE = "123"
WHERE (((dbo_tbl_service.PROPREF)="1") AND ((dbo_tbl_service.CONTRACT)="dum"))
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  #2  
Old May 9th, 2008, 10:18 AM
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sync_or_swim sync_or_swim is offline
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I'm not really sure of the syntax but I would suggest that you could use an IN query, something like this:
Code:
UPDATE dbo_tbl_service SET SERVICEDATE = '123' 
WHERE PROPREF = '1' AND CONTRACT = 'dum'
AND SERVICEDATE IN(SELECT MAX(SERVICEDATE) FROM dbo_tbl_service WHERE PROPREF = '1')
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Old May 15th, 2008, 07:23 AM
elenton elenton is offline
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sorry for late response, that worked grat thanks for the help
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Old May 15th, 2008, 11:25 AM
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Quote:
Originally Posted by elenton
sorry for late response, that worked grat thanks for the help

You're welcome, glad it helped!!
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