SQL Help - cleaning orphaned Interfaces

Somehow I have some Orphaned Interfaces.  Does anyone know how to clean that up?
I'm assuming the SQL statement:
UDPATE Interfaces
DELETE *
WHERE NodeID = '<NodeID of orphaned interfaces>'

I know I have some, because I have a custom field that defaults to NULL and shouldn't be empty unless no Node.

I also want to ensure that I cover all other data relating...

Any thoughts?
Thanks

Larry,  On your Orion server check the latest Maintenance log file, C:\Program Files\SolarWinds\Orion\swdebugMaintenance.log, for the following lines:

ERROR SolarWinds.Data.DatabaseMaintenance.NetworkElements - Failed to cleanup deleted network elements tables.
System.Data.SqlClient.SqlException: Line 1: Incorrect syntax near 'dbm_DeleteFromDeletedNodes'.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at SolarWinds.Data.DatabaseMaintenance.NetworkElements.DeleteNetworkElements(String tableName, String storedProcName)
   at SolarWinds.Data.DatabaseMaintenance.NetworkElements.RemoveDeletedElements()
2007-08-11 02:46:54,753 [1] INFO  SolarWinds.Data.DatabaseMaintenance.MaintenanceEngine - Database Maintenance Complete.

If they are there, then follow the simple instructions in this post:  http://thwack.com/forums/p/4654/20153.aspx#20153

Sure Enough, it's there.  Thanks for the heads up.