面试题求教!解决思路
面试题求教!
有一张表,里面有上千万条数据,用索引查询需要8秒,请问怎么才能在0点几秒的时间内把他们都查出来。。
不能用缓存,因为数据都是实时的
大侠们,救命啊,关系我的工作。
------解决方案--------------------
现在有答案对你工作有帮助吗?这个规模数据简单的排序 分页,语句写不好都要执行不少时间
这种情况让他给出表结构、及具体语句。把球推回给面试官
否则无从谈起 mission impossible
------解决方案--------------------
你这个我做过测试。,我写了一张表,插入了1KW条数据,测试效果还可以。你可以试试分区,或则分表,分表的话用MERGE类型的表 查询时间可以提高大约80~90%
------解决方案--------------------
删掉90%的数据就解决了

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