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via Oracle Community by 807553, 1 year ago
java.sql.SQLException: 20	at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:407)	at oracle.jdbc.driver.OracleConnection.(OracleConnection.java:152)	at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:214)	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:193)	at java.sql.DriverManager.getConnection(DriverManager.java:512)	at java.sql.DriverManager.getConnection(DriverManager.java:171)	at undefined.Employee.main(Employee.java:9)