多选题数据库中有一张表名为Emp，包含有如下列：EmpNO（雇员编号，Varchar（20），Pk），Job（职位Varchar（10）），HirDate（雇佣日期，Date），Sal（月薪，Float）。要求查询全部雇员信息应该是哪些数据？（）ASelect * From EmpBSelect * From Emp Where EmpNO Like '%%'CSelect * From Emp Where Name = '%%'DSelect * From Emp Where Name Like '%%'
多选题
数据库中有一张表名为Emp，包含有如下列：EmpNO（雇员编号，Varchar（20），Pk），Job（职位Varchar（10）），HirDate（雇佣日期，Date），Sal（月薪，Float）。要求查询全部雇员信息应该是哪些数据？（）
A
Select * From Emp
B
Select * From Emp Where EmpNO Like '%%'
C
Select * From Emp Where Name = '%%'
D
Select * From Emp Where Name Like '%%'
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单选题列出EMP表中，从事每个工种（JOB）的员工人数（）Aselect job from emp;Bselect job,count(*) from emp;Cselect distinct job,count(*) from emp;Dselect job,count(*) from emp group by job;Eselect job,sum(empno) from emp group by job;