【练习】oracle获取当前session的id方法

1.

18:54:26 SYS@ORA11GR2>SELECT SID FROM V$MYSTAT WHERE ROWNUM =1;

       SID
----------
        41

2.

18:58:28 SYS@ORA11GR2>SELECT USERENV('SID') FROM DUAL;

USERENV('SID')
--------------
            41