ORA-12505, TNS:listener does not currently know of SID given in connect descriptor

ptlk6789ptlk6789 Posts: 13

after entering all the info (Host/Port/DB SID/ Usr/ PWd) , i am entering query in query field. Then when i click on "Show Columns" button, i see :
Parameters of connection are invalid.
Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor

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