列出EMP表中,从事每个工种(JOB)的员工人数( )。选项: A:select job from emp;; B:select job,count(*) from emp;; C:select distinct job,count(*) from emp;; D:select job,count(*) from emp group by job; 每个 员工 人数 发布时间:2024-06-10 11:33:05