SQL and the like

Dave Ballantyne's blog. Freelance SQL Server database designer and developer at Clear Sky SQL

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Using a UDF as a SARG. Make a hash of it!
I am somewhat uncomfortable blogging this, as I feel that it falls into “Polish a turd” category. Having said that, it is a particularly ugly turd and it does polish up rather well. Though as the saying goes, it is still a turd. The evils and inadequacies...
SQL 101 : Without “ORDER BY”, order is not guaranteed.
It’s as simple as that. If you don’t specify ORDER BY, then the order of your result set is not guaranteed. Oh sure , there may be situations where the data looks like it is being returned ordered, but this is not really the case. So, for example : CREATE...
Optimal Query Plans With Unbalanced Data Loads
Sql Server is great at producing and caching efficient query plans.  However these plans may not be the most efficient based upon the parameters passed into subsequent calls off a stored procedure. In this article I am assuming that you have read...