> For the complete documentation index, see [llms.txt](https://ldbmcs.gitbook.io/java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ldbmcs.gitbook.io/java/shu-ju-ku-25.md).

# 数据库

- [PostgreSQL](https://ldbmcs.gitbook.io/java/shu-ju-ku-25/postgresql.md)
- [PostgreSQL upsert功能(insert on conflict do)的用法](https://ldbmcs.gitbook.io/java/shu-ju-ku-25/postgresql/postgresql-upsert-gong-neng-insert-on-conflict-do-de-yong-fa.md)