复杂SQL查询问题 SELECT A.*,B.NEWSCOUNT FROM A LEFT JOIN B ON A.USERNAME = B.ADDUSER 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 select a.*,b.newscountfrom userlist a left join (select adduser,count(*) as newscount from news group by adduser)bon a.username=b.adduser 1楼的不对,稍微修改下。SELECT A.USERNAME, COUNT(B.*) AS NEWSCOUNT FROM USERLIST A LEFT JOIN NEWS B ON A.USERNAME = B.ADDUSER GROUP BY A.USERNAME select a.*,b.newscount from userlist a,(select adduser,newscount=count(*) from news group by adduser)bwhere a.username=b.adduser sql如何删除两个表中的重复记录?求助大家 【求助】请教如何连续存入信息到同一个字段,信息之间以逗号隔开 就有2个字段,这样复杂查询怎么用where限制? 求Orders表中的最后十条纪录 请求帮助,谢谢 请帮忙写个sql语句 数据库邮件不能通过SMTP的身份验证 使用MySql ODBC进行MYsql和MSsql的数据转换?? sql 语句问题 如何将sql server数据库复制到光盘里,然后安装到另外一台机器上 sql2000企业版 数据库文件过大怎么办 小弟有几个惊天问题,困惑N年,高分想送,只求满意答案~~
from userlist a left join
(select adduser,count(*) as newscount from news group by adduser)b
on a.username=b.adduser
FROM USERLIST A LEFT JOIN NEWS B
ON A.USERNAME = B.ADDUSER
GROUP BY A.USERNAME
select a.*,b.newscount from userlist a,
(select adduser,newscount=count(*) from news group by adduser)b
where a.username=b.adduser