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• Download jTDS (open-source SQLServer JDBC driver) from here. Unzip and extract the jtds-1.2.jar or whatever the latest version.
• Start Oracle’s SQLDeveloper, Tools->Preferences->Database->Third Party JDBC Drivers. Click “Add Entry” and point to the jtds-1.2.jar
• Create a new connection, choose SQLServer tab, type in hostname, port, username and password. It appears that the initial connection name has to be the same as the database and you can click the “Retrieve database” button. Once you found the database, you can rename the connection.

Try it out.
Of course, certain things don’t work. Like explain plan and auto trace.

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What can we tell from this?
1. Schema name is ASK_TOM
2. There’s a tablespace ASK_TOM_LOG
3. There’s a partitioned table WWC_ASK_ACTIVITY_LOG$. Partition PART_12 is in ASK_TOM_LOG tablespace.
4. Eh, time to call DBA?

An invalid database link.

An update: Actually, any database link.
It comes from the second branch of the union-all clause of user_objects:
select l.name, NULL, to_number(null), to_number(null),
‘DATABASE LINK’,
l.ctime, to_date(null), NULL, ‘VALID’, ‘N’, ‘N’, ‘N’
from sys.link$ l
where l.owner# = userenv(‘SCHEMAID’);

1. NLS preferences, my pet peeve
2. View CLOB data
3. Export data to HTML
4. Search Engines, for OraDoc, AskTom, etc. Could augment firefox search plug-ins
5. Autotrace

Now it’s time to upgrade and try out.

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