Exception in thread "main" com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Unknown column 'username_name' in 'field list'

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:936)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2985)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)

at com.mysql.jdbc.Connection.execSQL(Connection.java:3283)

at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1332)

at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:882)

at com.imooc.dao.GoddessDao.addGoddess(GoddessDao.java:35)

at com.imooc.action.GoddessAction.main(GoddessAction.java:25)