What is SQL profiling?

What is SQL profiling?
SQL Server Profiler is a tool that captures SQL Server 2005 events from a server. The events are saved in a trace file that can later be analyzed or used to replay a specific series of steps when trying to diagnose a problem. SQL Server Profiler is used for activities such as:
Stepping through problem queries to find the cause of the problem.
Finding and diagnosing slow-running queries.
Capturing the series of Transact-SQL statements that lead to a problem. The saved trace can then be used to replicate the problem on a test server where the problem can be diagnosed.
Monitoring the performance of SQL Server to tune workloads. For information about tuning the physical database design for database workloads.
Correlating performance counters to diagnose problems

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