ORA-12505, TNS:listener does not currently know of SID given in connect des
问题 Please kindly help me as I just installed Oracle 11g but cannot connnect using SQL Devloper using the settings below: Username: system Password: mypassword Hostname: localhost Port: 1521 SID: XE Error message: Status : Failure -Test failed: Listener refused the connection with the following error: ORA-12505, TNS:listener does not currently know of SID given in connect descriptor I checked on Windows Services: OracleServiceXE: Started OracleXETNSListener: Started I also unable to connect to