When SQL Server’s estimated number of rows per operator are reasonably close to the actual number of rows, you’re likely getting a good plan. It may not be a fast plan, but it’ll accurately reflect the (possibly large) amount of work required. You can still reduce the amount of work done by changing the query or the…
4 Improving Cardinality Estimation Accuracy
When SQL Server’s estimated number of rows per operator are reasonably close to the actual number of rows, you’re likely getting a good plan. It may not be a fast plan, but it’ll accurately reflect the (possibly large) amount of work required. You can still reduce the amount of work done by changing the query or the...
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