■ sqlplus ユーザー名/パス@ホストＩＰ:ポート/サービス名 ■tnsnames.ora 識別子 = (DESCRIPTION = (ENABLE = BROKEN) (FAILOVER = ON) (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.111.210)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_…