MySQL has a feature called the query cache that stores the result of a query in memory, should it be needed again.

MySQL有一个特性称为查询缓存，它将（后面会用到的）查询结果保存在内存中。

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What Is Category and Why Should It Be Needed?

什么是范畴？为什么需要范畴？

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What Is Category and Why Should It Be Needed?

什么是范畴？为什么需要范畴？

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