select sys_context('userenv','host') from dual; 檢視主機名
select utl_inaddr.get_host_address from dual;檢視IP位址
(select banner from sys.v_$version where rownum=1),察看Oracle版本
select member from v$logfile where rownum=1 獲得作業系統版本
select instance_name from v$instance 獲得sid标示符
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