SQL event data is included in Enterprise Vault events. SQL can report an event for several reasons, such as a database that has run out of disk space.
You should become familiar with SQL Enterprise Manager. This tool lets you manage the SQL Server and the Enterprise Vault Directory database.
Use SQL Profiler to see what commands have been sent to the SQL database engine.
SQL may not recognize the SQL command it has been given. You can use SQL Profiler to check the commands. The event logged by the Directory Service tells you the command, but only if SQL returned control back to the Directory service. Start SQL Profiler from within SQL Enterprise Manager.