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Update from Select
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Information générale
Forum:
Microsoft SQL Server
Catégorie:
Stored procedures, Triggers, UDFs
Divers
Thread ID:
01673282
Message ID:
01673311
Vues:
38
>>One more question (hopefully, for your sake :), last one for today. Your code (below) works.
>>
>>declare @QtyUse as Int;
>>set @QtyUse = 1;
>>update t1 set t1.qty_left = t1.qty_left -  @QtyUse 
>>from myTable t1
>>inner join
>>(select top (1) t2.pk from MyTable t2 where t2.rec_id = '1' 
>> order by t2.date_rec) t2 on t1.pk = t2.pk
>>
>>
>>The only thing is, how do I determine that no record is found in the Select top(1) clause? So, that I can exit the While?
>
>I missed that question.
>
>Use
>
>IF @@ROWCOUNT = 0 condition
>--------------------------
>@@ROWCOUNT variable is updated after each statement, so it should be the next check right after UPDATE.

Thank you!
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