Probably the single most important factor when deciding which query to tune, or actively tuning a query, is how you go about measuring query execution time. SQL Server provides a number of different mechanisms (really, maybe too many) to get this done. However, all measures are not created equally. In fact, they frequently disagree with one another. Let’s take a look at this odd phenomenon.
Measuring Query Execution Time
Before we get into all the choices and compare them, let’s…
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