May 2019
Intermediate to advanced
484 pages
11h 23m
English
Content preview from Learn T-SQL Querying
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Managing Optimizer Changes with the Query Tuning Assistant
In this chapter, we will discuss a recently introduced feature: the Query Tuning Assistant (QTA). QTA aims to address some of the most common causes of cardinality estimation related performance regressions that may affect our T-SQL queries after an upgrade from an older version of SQL Server to a newer version, namely SQL Server 2016 and above.
At the time this book is being written, SQL Server 2008 and 2008 R2 are months away from completing their 10-year life cycle and reaching the end of their support; SQL Server 2014 reaches end of mainstream support at the same time; and SQL Server 2012 is no longer in mainstream support. This can raise concerns for all those still running applications ...
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