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Learn T-SQL Querying
book

Learn T-SQL Querying

by Pedro Lopes, Pam Lahoud
May 2019
Intermediate to advanced content levelIntermediate to advanced
484 pages
11h 23m
English
Packt Publishing
Content preview from Learn T-SQL Querying

Understanding QTA fundamentals

While guiding us through the recommended process, QTA doesn't follow it exactly. The very last step 5 will not have the same outcome as we saw in the previous section: instead of providing options to revert to a last known good plan, QTA helps to find a new state that is not the pre-CE upgrade or post-CE upgrade plan, but a new plan that will hopefully outperform both of the previous plans.

The following diagram summarizes the recommended steps to minimize risk with CE upgrades using QTA, which replaces the very last step of the process described in the Understanding where QTA is needed section:

How does QTA ...

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Publisher Resources

ISBN: 9781789348811Supplemental Content