MySQL是开源免费的数据库管理系统不需要付费使用mysql不收费吗

Wow, when it comes to MySQL, this is an old friend. To be honest, I chose it mainly because it was free. At that time I did not understand such profound things.我只是觉得这样可以省钱。
是的，它会省钱。

I remember it was around 2 008 . I was doing development work at a small company on a tight budget. At that time I was choosing a database and found MySQL quite suitable. There are a lot of people using it and the community support is very good. If you have a problem, you can find the answer on Baidu, saving you a lot of headaches.
然后是安全。
虽然当时我对数据加密和访问控制了解不多，但总觉得MySQL还算靠谱。
记得有一次，我们公司有一个处理敏感信息的项目，所以我检查了MySQL的安全配置，发现它提供的数据加密功能相当强，这让我很有安全感。

For ease of use, I was new to programming at that time. MySQL 的用户界面简单，文档也很全面。
我可能会在读几遍后开始。
它还支持许多语言，例如 PHP 和 Java。
At that time I was using Java and the connection was quite convenient.
就性能而言，MySQL也是当时最好的之一。
In our project, the amount of data is not large but the number of visits is quite high. MySQL can handle it without any problem and it is much faster than other databases.
然后是定制。
MySQL提供了一套完整的东西，并且可以根据需要调整配置，相当灵活。

I will briefly talk about this part of the case analysis. I remember our company's JavaWeb project at that time used MySQL to store data.下载并安装MySQL，设置密码，创建数据库和表，最后使用JavaJDBC连接数据库，编写简单的查询并检索数据。

Overall, MySQL is a good thing, with powerful functions, good performance, free, and suitable for a variety of occasions. But it must be said that, after all these years, the choice of database also depends on the specific situation. MySQL 不是必需的，但至少它是一个不错的选择。

MongoDB 4.0支持事务了，还有多少人想用MySQL呢？

MongoDB4 .0具有强大的事务功能和大数据兼容性，但SQL复杂度较低。

MySQL 稳定；适合传统企业；对于交易和复杂查询来说功能强大且经济高效。

该项目是一个数据模型；我们需要平衡绩效和团队经验。
虽然MongoDB4 .0事务有所改进，但MySQL仍然强大。

给自己计时。

mysql数据库有什么用

MySQL 是一个开源关系数据库。

Use: 1 . E-commerce system.双1 1 高峰期，淘宝使用MySQL每秒处理5 万笔订单。
2 . CRM Tools.像销售人员一样管理客户数据。
3 . Website user data. Facebook uses MySQL to store updates and supports 3 billion users. 4 . Data analysis. Tableau 通过 MySQL 收集数据来创建报告。
5 . High availability. The bank uses MySQL Cluster to secure transactions.
不要相信炒作。
使用前评估性能限制。