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mysql多表查询是出错解决办法

Jun 13, 2016 am 10:01 AM
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mysql多表查询是出错
各位大侠你们好,我做的论坛中其中有三个表,就是在回复页面显示的,就跟这个页面一样,但是右边回复的内容都可以从数据表中查询出来,但是左边的回复人的基本信息,只能查询出来一个,也就是全部的回复用户的基本信息都一样:如图:
我的表结构是这样的,主贴表,回帖表,用户表中的主要字段
主贴表topic:(tid,topic,tcontent,tuname,ttime);
回帖表reply:(rid,rtopic,rcontent,runame,rtime);
用户表uesr:(uid,uname,usex,ubirthday,等等);

,其中主贴表中含有主题的名称(topic),回帖表里面含有回复的主题名称字段(rtopic),并且topic与rtopic相同,现在我想根据回复主题的名称(rtopic)字段查询出对应的回复的用户(rname),然后再根据查处的用户名(rname),从用户表(user)中查处对应的(rname)的详细信息,请各位高手帮忙解决,谢谢!最好给出sql语句。


------解决方案--------------------

SQL code
select * from reply r left join user u on r.runame=u.uname where r.rtopic=主题名<div class="clear">
                 
              
              
        
            </div>
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