做网站旅游销售,网页设计代码写入文字,wordpress 公众账号,南京网站建设哪家好1、 USERENV(OPTION) 返回当前的会话信息.OPTION‘ISDBA‘若当前是DBA角色,则为TRUE,否则FALSE.OPTION‘LANGUAGE‘返回数据库的字符集.OPTION‘SESSIONID‘为当前会话标识符.OPTION‘ENTRYID‘返回可审计的会话标识符.OPTION‘LANG‘返回会话语言名称的ISO简记.OPTION‘INS…1、 USERENV(OPTION) 返回当前的会话信息.OPTION‘ISDBA‘若当前是DBA角色,则为TRUE,否则FALSE.OPTION‘LANGUAGE‘返回数据库的字符集.OPTION‘SESSIONID‘为当前会话标识符.OPTION‘ENTRYID‘返回可审计的会话标识符.OPTION‘LANG‘返回会话语言名称的ISO简记.OPTION‘INSTANCE‘返回当前的实例.OPTION‘terminal‘返回当前计算机名SELECT USERENV(‘LANGUAGE‘) FROM DUAL;2、sys_contextselectSYS_CONTEXT(‘USERENV‘,‘TERMINAL‘) terminal,SYS_CONTEXT(‘USERENV‘,‘LANGUAGE‘) language,SYS_CONTEXT(‘USERENV‘,‘SESSIONID‘) sessionid,SYS_CONTEXT(‘USERENV‘,‘INSTANCE‘) instance,SYS_CONTEXT(‘USERENV‘,‘ENTRYID‘) entryid,SYS_CONTEXT(‘USERENV‘,‘ISDBA‘) isdba,SYS_CONTEXT(‘USERENV‘,‘NLS_TERRITORY‘) nls_territory,SYS_CONTEXT(‘USERENV‘,‘NLS_CURRENCY‘) nls_currency,SYS_CONTEXT(‘USERENV‘,‘NLS_CALENDAR‘) nls_calendar,SYS_CONTEXT(‘USERENV‘,‘NLS_DATE_FORMAT‘) nls_date_format,SYS_CONTEXT(‘USERENV‘,‘NLS_DATE_LANGUAGE‘) nls_date_language,SYS_CONTEXT(‘USERENV‘,‘NLS_SORT‘) nls_sort,SYS_CONTEXT(‘USERENV‘,‘CURRENT_USER‘) current_user,SYS_CONTEXT(‘USERENV‘,‘CURRENT_USERID‘) current_userid,SYS_CONTEXT(‘USERENV‘,‘SESSION_USER‘) session_user,SYS_CONTEXT(‘USERENV‘,‘SESSION_USERID‘) session_userid,SYS_CONTEXT(‘USERENV‘,‘PROXY_USER‘) proxy_user,SYS_CONTEXT(‘USERENV‘,‘PROXY_USERID‘) proxy_userid,SYS_CONTEXT(‘USERENV‘,‘DB_DOMAIN‘) db_domain,SYS_CONTEXT(‘USERENV‘,‘DB_NAME‘) db_name,SYS_CONTEXT(‘USERENV‘,‘HOST‘) host,SYS_CONTEXT(‘USERENV‘,‘OS_USER‘) os_user,SYS_CONTEXT(‘USERENV‘,‘EXTERNAL_NAME‘) external_name,SYS_CONTEXT(‘USERENV‘,‘IP_ADDRESS‘) ip_address,SYS_CONTEXT(‘USERENV‘,‘NETWORK_PROTOCOL‘) network_protocol,SYS_CONTEXT(‘USERENV‘,‘BG_JOB_ID‘) bg_job_id,SYS_CONTEXT(‘USERENV‘,‘FG_JOB_ID‘) fg_job_id,SYS_CONTEXT(‘USERENV‘,‘AUTHENTICATION_TYPE‘) authentication_type,SYS_CONTEXT(‘USERENV‘,‘AUTHENTICATION_DATA‘) authentication_datafrom dual3.与系统视图v$session组合使用可以获得更多信息(客户端所使用的应用程序等)select *from v$session se,(select SYS_CONTEXT(‘USERENV‘, ‘TERMINAL‘) terminal,SYS_CONTEXT(‘USERENV‘, ‘LANGUAGE‘) language,SYS_CONTEXT(‘USERENV‘, ‘SESSIONID‘) sessionid,SYS_CONTEXT(‘USERENV‘, ‘INSTANCE‘) instance,SYS_CONTEXT(‘USERENV‘, ‘ENTRYID‘) entryid,SYS_CONTEXT(‘USERENV‘, ‘ISDBA‘) isdba,SYS_CONTEXT(‘USERENV‘, ‘NLS_TERRITORY‘) nls_territory,SYS_CONTEXT(‘USERENV‘, ‘NLS_CURRENCY‘) nls_currency,SYS_CONTEXT(‘USERENV‘, ‘NLS_CALENDAR‘) nls_calendar,SYS_CONTEXT(‘USERENV‘, ‘NLS_DATE_FORMAT‘) nls_date_format,SYS_CONTEXT(‘USERENV‘, ‘NLS_DATE_LANGUAGE‘) nls_date_language,SYS_CONTEXT(‘USERENV‘, ‘NLS_SORT‘) nls_sort,SYS_CONTEXT(‘USERENV‘, ‘CURRENT_USER‘) current_user,SYS_CONTEXT(‘USERENV‘, ‘CURRENT_USERID‘) current_userid,SYS_CONTEXT(‘USERENV‘, ‘SESSION_USER‘) session_user,SYS_CONTEXT(‘USERENV‘, ‘SESSION_USERID‘) session_userid,SYS_CONTEXT(‘USERENV‘, ‘PROXY_USER‘) proxy_user,SYS_CONTEXT(‘USERENV‘, ‘PROXY_USERID‘) proxy_userid,SYS_CONTEXT(‘USERENV‘, ‘DB_DOMAIN‘) db_domain,SYS_CONTEXT(‘USERENV‘, ‘DB_NAME‘) db_name,SYS_CONTEXT(‘USERENV‘, ‘HOST‘) host,SYS_CONTEXT(‘USERENV‘, ‘OS_USER‘) os_user,SYS_CONTEXT(‘USERENV‘, ‘EXTERNAL_NAME‘) external_name,SYS_CONTEXT(‘USERENV‘, ‘IP_ADDRESS‘) ip_address,SYS_CONTEXT(‘USERENV‘, ‘NETWORK_PROTOCOL‘) network_protocol,SYS_CONTEXT(‘USERENV‘, ‘BG_JOB_ID‘) bg_job_id,SYS_CONTEXT(‘USERENV‘, ‘FG_JOB_ID‘) fg_job_id,SYS_CONTEXT(‘USERENV‘, ‘AUTHENTICATION_TYPE‘) authentication_type,SYS_CONTEXT(‘USERENV‘, ‘AUTHENTICATION_DATA‘) authentication_datafrom dual) basewhere se.AUDSID base.sessionid;原文http://www.jb51.net/article/58755.htm
