> For the complete documentation index, see [llms.txt](https://gyx8899.gitbook.io/blog/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gyx8899.gitbook.io/blog/docs/sql.md).

# SQL

## 练习

* [sqlteaching](https://www.sqlteaching.com/)