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现在问题是有很多数据在一个List里面,然后要进行各种分组统计，有没有什么框架支持导入List进去然后作为一张表的数据用SQL查询。
目前是用各种循环进行分组统计还有排重统计，但是这样写出来的代码不易维护而且效率估计不高，求一个轻量级的库最好是不用连server的直接以List的数据做表进行查询。
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In-memory relational database: h2database, hsqldb, apache derby.
memorynosql:elasticsearch
Handwritten code: java 8 collection stream api combined with apache commons math
Search online. If you have any, please share them with me.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
In-memory relational database: h2database, hsqldb, apache derby.
memorynosql:elasticsearch
Handwritten code: java 8 collection stream api combined with apache commons math
Search online. If you have any, please share them with me.