> For the complete documentation index, see [llms.txt](https://blog.tsingjyujing.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blog.tsingjyujing.com/tech/database.md).

# 数据库技术

- [记一个离谱的MySQL语句的性能问题](https://blog.tsingjyujing.com/tech/database/mysql-optimizer-in-clause.md)
- [为PostgreSQL配置SSL加密](https://blog.tsingjyujing.com/tech/database/postgresql-ssl.md)