Sometimes… as Oracle DBA you need to connect to SQL Server (with Oracle SQL Developer and jTDS plug-in installed).
When using ‘SQL Server Management Studio’, the ‘Server name’ is in the format:
This won’t work in SQL Developer:
Status : Failure -Unknown server host name 'SERVERNAME\INSTANCE'.
This can be solved using the ‘hostname’ in the next format in SQL Developer:
For me it worked :)