This section contains sample XML input files that you can use with the dta command line tool. This tool is one of the user interfaces to the Database Engine Tuning Advisor, a tool you can use to tune databases for improved query performance. Database Engine Tuning Advisor analyzes the effects of a workload against a database or multiple databases. A workload is a set of Transact-SQL statements that execute against databases that you want to tune. After Database Engine Tuning Advisor finishes analyzing the effects of the workload, it creates a recommendation for adding indexes, indexed views, or partitioning strategies that will improve query performance on your databases.