The company will employ the most suitable people to ().
A.attend an interview
B.join in the club
C.go to hospital
A.attend an interview
B.join in the club
C.go to hospital
关于三号线EMP紧急停车按钮的设置,描述不正确的有()
A.站台两侧需放置相应的上、下行EMP装置。
B.站台的上、下行EMP装置与车控室内IBP盘上的EMP报警相互串联。
C.站台的上、下行EMP装置与车控室内IBP盘上的EMP报警相互并联。
D.当按压EMP按钮时,列车应能在相应的轨道区段区域紧急停车。
A.lter table emp remove address
B.lter table emp drop column address
C.lter table emp delete column address
D.lter table emp delete address
A.select deptno, max(salary) from emp group by deptn
B.select job, max(salary) from emp group by job having max(salary)>10000
C.select job, max(salary) from emp order by job
D.select job, max(salary) from emp group by salary having max(salary)>10000
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
A.alter table emp drop column addcolumn
B.alter table emp remove addcolumn
C.alter table emp delete addcolumn
D.alter table emp delete column addcolumn
A.select ename,job,sal from emp where sal in(select avg(sal) from emp group by deptno)
B.select ename,job,sal from emp where sal in(select min(sal) from emp order by deptno)
C.select ename,job,sal from emp where sal in(select min(sal) from emp group by deptno)
D.select ename,job,min(sal) from emp where sal group by deptno