sql dm is a mysql monitoring tool that gives dbas real-time insights for optimizing the performance of mysql servers.

heidisql is a free and powerful client for mariadb, mysql, microsoft sql server, postgresql and sqlite

专为终身学习者定制的编程知识社区

stack overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

jetbrains is a cutting-edge software vendor specializing in the creation of intelligent development tools, including intellij idea – the leading java ide, and the kotlin programming language.

掘金是面向全球中文开发者的技术内容分享与交流平台。我们通过技术文章、沸点、课程、直播等产品和服务，打造一个激发开发者创作灵感，激励开发者沉淀分享，陪伴开发者成长的综合类技术社区。

github is where over 100 million developers shape the future of software, together. contribute to the open source community, manage your git repositories, review code like a pro, track bugs and features, power your ci/cd and devops workflows, and secure code before you commit it.