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Incorrect Results with Merge Join
Every product has bugs, and SQL Server is no exception. Using product features in a slightly unusual way (or combining relatively new features together) is a great way to find them. Bugs can be...
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Avoiding Sorts with Merge Join Concatenation
The SQL Server query execution engine has two ways to implement a logical 'union all' operation, using the Concatenation and Merge Join Concatenation physical operators. While the logical operation is...
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