11g中下面两个sql执行计划是否有差异
select d.deptno from dept d,emp e
where d.deptno = e.deptno;
select d.deptno from dept d,emp e
where e.deptno = d.deptno;
11g中下面两个sql执行计划是否有差异
select d.deptno from dept d,emp e
where d.deptno = e.deptno;
select d.deptno from dept d,emp e
where e.deptno = d.deptno;