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Posted by / 01-Jul-2017 05:48

Ms sql updating multiple rows

This way, you knock down a bit on NUM_QUERIES, but COST_QUERY_PERFORMANCE goes up bigtime.

If COST_QUERY_SETUP is really huge (e.g., you're calling some network service which is real slow) then, yes, you might still end up on top.

I suppose you should have logic in your trigger that only logs changed values, but is there perhaps a solution where only rows that meet conditions are updated? If you omit the WHERE clause, all records in the table will be updated! The WHERE clause specifies which record(s) that should be updated.The traditional advice for improving performance for multiple UPDATE statements is to “prepare” the required query once, and then “execute” the prepared query once for each row requiring an update.But in many cases this only provides a modest improvement as each UPDATE operation still requires a round-trip communication with the database server.

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