Abstract: Database performance is a very important factor in the development of any application. Some applications need very fast feedback, others process a large amount of data and without the ...

MVCC 中文名称叫多版本并发控制，是InnoDB 引擎为了提高执行事务的并发效率引入的概念。多版本的含义就是一条数据被多个事务修改后，在事务还没有被提交前，存在多个版本。MVCC 的实现机制就是通过版本链把多个版本连接起来。 大家好，我是君哥。

爬虫抓取数据后，怎样存储才是最好的方式呢？先来盘点一下可以使用的存储方式 这是最简单，最方便，最实用的存储方式，json格式保证你在打开文件时，可以直观的检查所存储的数据，一条数据存储一行，这种方式适用于爬取数据量比较小的情况，后续的 ...

Community driven content discussing all aspects of software development from DevOps to design patterns. SQLite is an incredibly lightweight and remarkably popular SQL-compliant database. In fact, it’s ...

We have seen how to read data from a file, either in unstructured text or CSV format, and how to write data in these formats. We’ve also seen how to read and write JSON. In this chapter we’ll see how ...

Sometimes the best option is the simplest, even when it comes to databases. While many developers reach for Postgres or MySQL by default, might it be better to take the more lightweight approach to ...