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Posted by / 27-Mar-2017 10:39

(If it cannot be that the row already has those values then leave that code out; but I've seen large UPDATES where the trigger re-updates them, changing nothing, but bloating the log and taking more CPU !! Answer will NOT be true if either is Null I still don't think you should be using NOLOCK. Answer will NOT be true if either is Null I still don't think you should be using NOLOCK.

I did not completely follow the logic that you are trying to implement, but it seemed like you are trying to recursively update a column until it settles down to some value.And do they contain a single row per row of data changed or are they truly tables? These two tables if they contain anything, contain a row for every row of data affected and therefore should be treated as tables.The trigger only fires once per operation under normal circumstances.I'm trying to put triggers on an existing database, but I am having a hard time understanding how to use the inserted and deleted tables.They make sense when I'm dealing with an INSERT or DELETE operation, but how about an update?

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INSTEAD OF UPDATE triggers can be defined on a view or table to replace the standard action of the UPDATE statement.

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