一般通过USERENV()函数获取

SELECT USERENV('ISDBA'),

USERENV('LANGUAGE'),

USERENV('ENTRYID'),

USERENV('LANG'),

USERENV('INSTANCE')

FROM DUAL

也可以通过以下函数获取

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_DATA

FROM DUAL