数据库设计的困惑
情况是这样的，我以前做网站的时候遇到像“推荐”，“置顶”啊之类的，都是在表里加一个字段如“IsTop”或是"IsDelete"等，用BOOL型。可是最近来到新公司，公司的领导不是这么做的。如：“IsTop”表示是否删除，他就用建一个news_delete表，里面的记录就是己经"IsTop"的ID值。
这么做好像也不错，用起也很方便。要增加别的类似别的，不用在修改原有的表了。请问在数据库设计方面的高手们，如何是好。
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感觉都可以，如果觉得数据结构复杂，就按照第二种来设计，拆分开来。
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要学会宽容
对于你的描述，没有一定的规则
附加的属性与基础数据有紧密的联系
很显然，你的方案要优于分表方案
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自定义字段的两种做法，一种是往本表加字段，一种是建一自定义字段表存值。个人认为各有千秋吧，后者语句稍微复杂些，也不好弄索引，搜索不方便，需要join操作,数据增多，可能会有效率问题，不过胜在扩展方便，前者简单暴力，方便设置索引进行搜索，不过不好扩展业务，最好两种方案都保留，具体问题具体做法。
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问题解决了 也该把贴结了。看看你的结贴率。0% 发帖：7 正常结贴：0
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