The OutputCacheParameters.SqlDependency string identifies databases and tables according to the name of a SQL Server cache dependency in your configuration (typically added using the <sqlcachedependency> configuration elements). If you use SQL Server 2005, you can set the OutputCacheParameters.SqlDependency property to "CommandNotification", which instructs ASP.NET to create row-level dependencies for all SQL commands issued within the context of the current ASP.NET page.