Is there a way to SELECT and UPDATE rows at the same time?

Question

I\'d like to update a set of rows based on a simple criteria and get the list of PKs that were changed. I thought I could just do something like this but am worried about po

Answer 1

Many years later...

The accepted answer of using the OUTPUT clause is good. I had to dig up the actual syntax, so here it is:

DECLARE @UpdatedIDs table (ID int)
UPDATE 
    Table1 
SET 
    AlertDate = getutcdate() 
OUTPUT
    inserted.Id
INTO
    @UpdatedIDs
WHERE 
    AlertDate IS NULL;

ADDED SEP 14, 2015:

"Can I use a scalar variable instead of a table variable?" one may ask... Sorry, but no you can't. You'll have to SELECT @SomeID = ID from @UpdatedIDs if you need a single ID.