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查两次数据库 VS 合并查询 该如何选择?

WBOY
Release： 2016-06-23 13:53:00
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打个比方

就以论坛来讲，

帖子表+会员表

才能显示 文章内容页面的基本内容


A. 一般是查询好内容，什么作者ID，再去SELECT 会员表吗?

B. 还是查询时已经同时做好合并查询 把 帖子表.作者ID  = 会员表.会员ID ???

那个比较好?  大家应该是以效能作选择吧?


回复讨论(解决方案)

对于关系型数据库（SQL），B 是首选
对于 noSQL， A 是首选

Related labels：
twice merge database Inquire choose
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