为自己加油

对数据库运行下列哪个group by查询时会从Oracle产生错误？

A.select deptno, job, sum(sal) from emp group by job, deptno;
B.select sum(sal), deptno, job from emp group by job, deptno;
C.select deptno, job, sum(sal) from emp;
D.select deptno, sum(sal), job from emp group by job, deptno;