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在网站数据库内有很多文章,都被打上了有关的tag,当用户注册的时候,会要求用户选择喜欢的tag,然后使用余弦相似度算法计算后在首页推荐给他,但是这样每次访问都会重新计算一次,该怎样设计数据库来保存给用户的推荐?
ringa_lee
把tag用逗号隔开,合并成字符串,然后保存~
把tag用逗号隔开,合并成字符串,然后保存~