Oracle 里的Hint

查看详细的统计信息

set serveroutput off;
SELECT /*+ GATHER_PLAN_STATISTICS */ T1.EMPNO, T1.ENAME, T2.DNAME FROM SCOTT.EMP T1,SCOTT.DEPT T2 WHERE T1.DEPTNO = T2.DEPTNO;
SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR (NULL, NULL, 'ALLSTATS LAST'));

查看执行大钢

SELECT * FROM TABLE (DBMS_XPLAN.DISPLAY_CURSOR (NULL, NULL, 'ADVANCED'));