The Spark SQL system improves efficiency of execution by describing data analysis tasks and optimizing according to query optimization theory. However, the query optimization function of Spark SQL ...

SQL query optimization aims to choose an optimal Query Execution Plan (QEP) for a query. The existing optimizers usually choose the plan with the minimal execution cost. However, in some real ...

From in-database analytics to mobile reports, view the Microsoft SQL Server 2019 functions and features that deliver breakthrough performance for your data platform.