To use the Index Tuning Wizard, the server name and the database name must be specified. In addition, the wizard requires a workload file as its input. The workload file is used to capture the nature of the usage statistics against the database system. Any SQL Server Profiler trace can be used as a workload file. SQL Server Profiler is a graphical SQL Server client tool that makes it possible to monitor and record engine events in a workload file. A typical entry in such a workload file may consist of a variety of fields: event-class, text of the event (for example, text of the Transact-SQL query), start-time, and duration of the event. The Index Tuning Wizard can extract engine relevant events (such as Transact-SQL statements) and fields from a SQL Server Profiler trace automatically. Alternatively, any file that contains a set of Transact-SQL statements (separated by the delimiter GO) also can be used as a workload file. Such files may contain customer benchmarks for which the index selection must be tuned.