> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/tutorial/advanced-features/introduction.md).

# 3.1. 簡介

在前面的章節，我們介紹了如何使用 SQL 來存取 PostgreSQL 的基本方式。接下來，我們將會討論更多先進的功能，SQL 的管理功能以及防止資料遺失或損毁。最後，我們也會介紹一些 PostgreSQL 的延伸功能。

這個章節偶爾會引用[第 2 章](/tutorial/the-sql-language.md)的範例，試著去改寫或是優化他們，所以閱讀過上一章也是很有用的。在這一章中有一些範例是來自於 tutorial 目錄中的 advanced.sql，這個檔案有一些範例資料可以載入，但載入方式在此就不再贅述。（請參閱 [2.1 節](/tutorial/the-sql-language/introduction.md)的內容）


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