# V. 資料庫程式設計

這部分是關於使用使用者定義的函數、資料型別、觸發器等延伸資料庫功能。這些是進階的主題，只有在理解了有關 PostgreSQL 的所有其他使用文件之後，才適合閱讀這些進階主題。本部分後面的章節描述了 PostgreSQL 發行版中可用的伺服器程序語言，以及有關伺服器程序語言的常見問題。在深入研究伺服器程序語言之前，至少必須閱讀[第 37 章](/server-programming/extending-sql.md)的部分（函數介紹）。


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