www.5129.net > SELECT uiD,Count(*) FROM mB_u_ACtivE group By u...

SELECT uiD,Count(*) FROM mB_u_ACtivE group By u...

count(*) as number 取个别名 下面用rs("number")

子查询中select count(1) as num from A where A.ID = B.ID 就是统计B表和A表用ID连接的行数 子查询的行数=0,就可以实现从B表中排除A表数据

select type from A where year=2012 group by type order by score desc 如果有分组的话,查询的列 必须要在分组中

那就不count了吧,类似这样的: Query q = session.createQuery("select u.id,u.name,count(*) from User u group by u.id,u.name"); System....

你的配置文件没有 被加载起来 所以无法使用对象查询 只能使用SQL 查询

分组查询,你前面查询的列不能用*号, select t.u_id from (select * from loginrecord order by l_time desc) t group by t.u_id 不知是否正确,你试试...

你可以这样写select u.use002, g.gzl011,g.gzl002,g.gzl005,sum(datediff(MI,g.gzl006,g.gzl007)) from ysbook_010.dbo.ysgzl g,ysdata.dbo.xtuse u where g.gzl010 = u.use001 group u.use002,g.gzl011,g.gzl002,g.gzl005

select U.uid, COUNT(*) AS 持有量 from U LEFT join UO on U.uid = UO.uid group by U.uid 第二个问题 select U.uid, COUNT(*) AS ...

语句: select * from (select * from user where u_id not in(select min(u_id) from user group by u_name) group by u_name union allselect * from user group by u_name ) a order by u_name,u_num 图片: select * from user; select * fr...

select 学号, avg(分数) from grade group by 学号 having count(distinct 课程编号) > 1select 学号 as u_编号, 姓名 as u_名称...

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