ORA-12514: TNS:listener does not currently know of service requested in connect descriptor /ora-12505 tns listener does not currently know of sid
If you intend to connect with service name XE, edit your listener.ora to look include the XE name. Sample below SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = XE) (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server) ) (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server) (PROGRAM = extproc) ) (SID_DESC = (SID_NAME = CLRExtProc) (ORACLE_HOME = C:\oraclexe\app\oracle\product\11.2.0\server) (PROGRAM = extproc) ) ) LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1)) (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) ) ...