Hash Joins on Nullable Columns


Published On: November 3, 2015

Categories: Execution Plans, Query Plan Analysis 0

Paul White (@SQL_Kiwi) discusses some less well-known query optimizer features and limitations, and explains poor performance of certain hash joins.

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SQLPerformance.com is about providing innovative and practical solutions for improving SQL Server performance. Whether you are running a 3rd party application database where very little can be changed, or you are a DBA at a site where getting the application developers to change anything is next to impossible, industry experts including Paul Randal, Jonathan Kehayias, Erin Stellato and Paul White will cover both the "how" and the "why."