ROWID伪列
vastbase=# select rowid,empno,ename from emp;
rowid | empno | ename
----------------------+-------+--------
GUAAAA==AAAAAA==AQA= | 7369 | SMITH
GUAAAA==AAAAAA==AgA= | 7499 | ALLEN
GUAAAA==AAAAAA==AwA= | 7521 | WARD
GUAAAA==AAAAAA==BAA= | 7566 | JONES
GUAAAA==AAAAAA==BQA= | 7654 | MARTIN
GUAAAA==AAAAAA==BgA= | 7698 | BLAKE
GUAAAA==AAAAAA==BwA= | 7782 | CLARK
GUAAAA==AAAAAA==CAA= | 7839 | KING
GUAAAA==AAAAAA==CQA= | 7844 | TURNER
GUAAAA==AAAAAA==CgA= | 7900 | JAMES
GUAAAA==AAAAAA==CwA= | 7902 | FORD
GUAAAA==AAAAAA==DAA= | 7934 | MILLER
(12 rows)
