mysql分组查询group by 与having

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select a.run_id,a.user_id,b.dept_id,  count(*) as jishu from  flow_run_prcs as a,user as b where a.USER_ID=b.user_id  group by run_id,user_id,dept_id having count(*)>1;
select a.run_id,b.dept_id,count(*) as jishu from  flow_run_prcs as a,user as b where a.USER_ID=b.user_id  group by run_id,dept_id having count(*)>1;
select b.dept_id,count(run_id) as jishu from  flow_run_prcs as a,user as b where a.USER_ID=b.user_id  group by dept_id having count(dept_id)>1;