mysql 统计排名 set@mycnt=0;SELECT*FROMSELECT id,score,(@mycnt:=mycnt+1)as rank FROM tab t ORDER BY score desc)a ORDER BY id
mysql order by排序一个统计出来的数据 select t1.shop_id,count(1)from shop t1 left join goods t2 on t1.shop_id=t2.shop_idgroup by t1.shop_idorder by count(1)desc
mysql统计函数有哪些,可以通过myql统计函数,来计算表中总数,最大值,最小值等
mysql 统计共有几个月 sql语句? 告诉你个方法,具体自己写吧select monthly,count(*)from(select disctinct substr(realTime,1,2)as monthly from table))group by monthly;这样结果就是4月 36月 37月 3假设realTime是字符类型,substr就截取头两位如:\"4月望采纳,不懂可以问.
mysql查询总数是在查询中进行统计还是单独统计好 直接统计好,但是你的 第二段SQL 后面少 GROUP BY id,title,intro
Mysql数据统计 创建一个视图,直接调用create view tongji asselect courseId,stuId,CASE stateWHEN '1' THEN '正常'WHEN '2' THEN '请假'ELSE '其他' END,count(*)as cs from func order by courseId,stuId,state
Mysql 多表统计大量数据 select(select u._netName from t_gw_netuser u where u._netName=a._uid)_netName,(select w._urlName from t_gw_websiteurl w where w._urlId=w._url)_urlName,count(distinct a._url)CUrl,count(a._host)CHost,sum(a._count)SCount,SUl,SDl,a._logtimefrom t_gw_merge_log a join(select sum(p._ul)SUl,sum(p._dl)SDl,p._appId from t_gw_applog p group by p._appId)x on a._app=x._appIdgroup by a._uid,a._urlorder by_urlName考虑下这个SQL