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php 的多表查询 怎么做??

你是三个表吗? order 的orderid 对应order_goods的orderid order_goods的goodsid 对应 goods的id 然后你是想通过产品ID查询订单出来? SELECT * FROM order WHERE orderid IN (select og.orderid from order_goods og left join goods g ON og....

"select * from 收藏表 as A,用户表 as B where A.user_id=B.user_id and A.user_id='张三'";

b, c, d 三张表的 name 你给出了a表的四个字段,第四个字段是干嘛的? userId 不加上了,不知道你这个字段是干嘛的。 b, c, d 三张表中的name字段对应着a表中的wareId, goodsId, wareManager SELECT *FROM a, b, c, dWHERE a.wareId = b.nameAND...

给各个表的字段起别名 比如select fly_blog_article.id as fbaid, fly_blog_comment.fid as fbcid ,(。。。这里字段省略按照自己字段填写) from fly_blog_article,fly_blog_comment where fly_blog_article.id = fly_blog_comment.fid 然后输出...

select * from databasea.table1 union select * from databaseb.table2 ; 不推荐垮库使用.弊端太多

以一个 user 表和 jifen 表联查为例,, 第一种方式: $data = M('user as a')->join('jifen as b on b.id = a.id')->where('a.id = 1')->select(); 第二种: $data = M()->table('user as a')->join('jifen as b on b.id = a.id')->where(' a.id...

M('user')->field('u.*')->join('u left join new n on n.userid = u.userid')->select();echo M('user')->getLastSql();// 查看上一条sql语句

以一个 user 表和 jifen 表联查为例,, 第一种方式: $data = M('user as a')->join('jifen as b on b.id = a.id')->where('a.id = 1')->select(); 第二种: $data = M()->table('user as a')->join('jifen as b on b.id = a.id')->where(' a.id...

在这句代码 "FROM " . $GLOBALS['ecs']->table('order_goods')." AS og, ".$GLOBALS['ecs']->table('order_info')." AS oi ". 后面加(注意点号的连接): " LEFT JOIN ". $GLOBALS['ecs']->table('goods') . "AS g ON og.goods_id = g.goods_id "....

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