I downloaded SqlDeveloper from this url:
I chose Windows 64-bit. My PC is Windows 7 64-bit.
I can connect to remote databases as expected using the SqlDeveloper IDE. But I cannot connect to the local database residing on the same PC on which I am running the SqlDeveloper.
SQL*Plus: Release 220.127.116.11.0 Production on Thu Nov 21 00:24:31 2013
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SQL> connect usr1/usr1
SQL> select name from v$database;
Could you please help troubleshoot? Thanks a lot.