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替代文字

例如，如果我有

follow table
company one ( cid = 1 ) following two ( cid = 2 )
company one ( cid = 1 ) following three( cid = 3 )

feeds table
company one ( cid = 1 ) type 'product' description 'hello ive updated a product';
company two ( cid = 2 ) type 'product' description 'hello ive updated a product im from company 2';
company three ( cid = 3 ) type 'shoutout' description 'hello ive i got a shoutout im company 3';
company one ( cid = 1 ) type 'product' description 'hello ive updated my second product';

问题

我如何从我的公司获得所有 feeds.description（例如这里是 cid = 1）？

这是我的简单 pdo sql 来获取我的。

    $data['feeds']['cid'] = 1;

    return $this->db->fetchAll("SELECT feeds.type, feeds.$type, feeds.cid, feeds.time, companies.name FROM feeds, companies WHERE 
    feeds.cid = :cid AND companies.cid = :cid ORDER BY feeds.fid DESC LIMIT 0, 5", $data['feeds']);

this will display
hello ive updated a product
hello ive updated my second product

也许是这样的？（ 失败 ）

    $data['feeds']['cid'] = 1,2,3;

    return $this->db->fetchAll("SELECT feeds.type, feeds.$type, feeds.cid, feeds.time, companies.name FROM feeds, companies WHERE 
    feeds.cid = :cid AND companies.cid = :cid ORDER BY feeds.fid DESC LIMIT 0, 5", $data['feeds']);

this should be displaying like
hello ive updated a product
hello ive updated a product im from company 2
hello ive i got a shoutout im company 3
hello ive updated my second product

或更简单地从我的每个 follow.following ( cid = 1,2,3,etc ) 中获取 feeds.description。( cid = 1) 或者 twitter 获取我所有朋友的状态（我关注的朋友）

编辑*

irc mysql 的一些好人说要使用连接。但我就是不明白。我得到的是这个

fetch all the follow.following from cid = me ( example cid = 1 )

然后

SELECT * FROM feeds WHERE feeds.cid = IN (2,3,cid that im following ( see follow.following ))

任何人都可以给我一个加入这个问题的例子吗？

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1 回答 1

1

因此，假设问题是“我如何从我的公司关注的公司获取所有 feeds.description？” 您想使用以下密钥加入：

select 
companies.name, 
feeds.type, 
feeds.description 
from follow 
inner join feeds on (follow.following = feeds.cid or follow.cid = feeds.cid)
inner join companies on (feeds.cid = companies.cid)
where follow.cid = :cid
order by feeds.fid desc 
limit 5;

这应该列出您的 :cid (1) 关注的所有公司。

编辑：提要应包括我公司的提要+我公司关注的提要。

于 2010-08-30T00:57:15.007 回答