Sunday, March 05, 2006

SQL Server Cursors Not Always Evil

By know you probably heard a thousand times not to use cursors but to use a set based solution instead. Cursors are bad, almost everything that can be written in a cursor can be rewritten to use a set based approach etc etc etc. Well SQL Server MVP Adam Machanic has a great post on his blog that will show you that a cusrsor sometimes is actually faster than a set based solution. Read the post Running sums, redux
A day later Adam created another entry on his blog, this time using SQLCLR code to rewrite the cursor code and improving the execution time by 25%. You can read that entry here (Running sums yet again: SQLCLR saves the day!)
So as you can see cursors do have a place in SQL Server and are sometimes a better option

1 comment:

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