这样一句SQL语句应该如何写？搞了很久没有做出来 -PHP Tutorial-php.cn

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这样一句SQL语句应该如何写？搞了很久没有做出来

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Jun 13, 2016 pm 12:56 PM

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这样一句SQL语句应该怎么写？、、搞了很久没有做出来
存在表A，字段如下：
id     ident_name    icon        imageicon
01         黄       icon/a.jpg      icon/a1.jpg
02         刘       icon/b.jpg     icon/b1.jpg
03         张       icon/c.jpg     icon/c1.jpg
04         李       icon/d.jpg     icon/d1.jpg

存在表B，字段如下：
id   friend  myfriend
01    黄        刘
02    黄         张
ident_name和friend相关，我想查询的表B黄的朋友相关资料：SQL语句怎么?//////如下
friend  myfriend    icon        imageicon
黄         刘       icon/a.jpg    icon/a1.jpg
黄         张       icon/b.jpg    icon/b1.jpg

------解决方案--------------------
select b.friend ,b.myfriend , a.icon, a.imageicon from 表B b inner join 表A a on b.myfriend=a.ident_name
------解决方案--------------------
select * from A where ident_name in (select myfriend from B where friend = '黄')
------解决方案--------------------
select b.friend,b.myfriend ,(select a.icon from 表A a where a.ident_name=b.myfriend) as icon, (select a.imageicon from 表A a where a.ident_name=b.myfriend) as imageicon from 表B b where b.friend='黄'

笨方法~~，不知道效率如何。

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