你可能喜欢
单项选择题
A.select*from scott.wz where wunit is null and rownum<5
B.select*from myuser.wz where wunit = null and rownum<5
C.select*from myuser.wz where wunit is null and rownum<6
D.select*form scott.wz where wunit is null and rownum<6
单项选择题
A.Grant drop any table to user1
B.Grant drop any table to user1 with admin option
C.Grant drop table to user1
D.Grant drop any table to user1 with check potion
单项选择题
A.SELECT e.empno,e.ename, e.deptno, d.deptno,d.loc FROM emp e,dept d WHERE e.deptno=d.deptno
B.SELECT e.empno, e.ename, e.deptno, d.deptno,d.loc FROM emp e,dept d
C.SELECT e.empno, e.ename, e.deptno, d.deptno,d.loc FROM emp e,dept d WHERE e.empno=101 and e.deptno=d.deptno
D.SELECT e.empno, e.ename, e.deptno, d.deptno,d.loc FROM emp e,dept d WHEREe.deptno=d.deptno and d.deptno=60
单项选择题
A.OPEN emp_cursor
B.OPEN emp_cursor FOR 20
C.OPEN emp_cursor USING 20
D.FOR emp_rec IN emp_cursor(20) LOOP … END LOOP