The process of query optimization is very computationally expensive. For this reason, SQL Server stores execution plans in a cache (called the plan cache), so that the stored execution plan is ...

Hence, overall performance suffers, in addition to the performance of that individual query with the poor plan quality. SQL Server 2017 fixes the plan quality issues of previous releases via three new ...

SQL Server has an optimizer that usually does a great job of optimizing code for the most effective execution. A query execution plan is the breakdown of how the optimizer will run (or ran ...

or hinting queries to try to get a specific execution plan. However, with the introduction of the query store, you could upgrade your SQL Server to a newer version and capture query performance ...