A.SELECT*FROMsh_goodsWHERE0;
B.SELECT*FROMsh_goodsGROUPBYcategory_idWHEREprice>5;
C.SELECT*FROMsh_goodsLIMIT3ORDERBYprice;
D.以上选项都不正确
A.回滚段上用户恢复数据的信息
B.被程序语句获得的锁
C.Redo log buffer中的空间
D.DBMS管理资源中的内部花费
A.SELECT ename, sal FROM EMP
B.SELECT ename,sal, sal+100 FROM emp
C.SELECT ename,sal,12*sal+100 FROM emp
D.SELECT ename,sal,12*(sal+100)FROM EMP