# 39. Triggers

這章中介紹有關於觸發器函數的基本導引。觸發器函數能夠用大多數的程序語言編寫， 包括 PL/pgSQL([第42章](https://www.postgresql.org/docs/10/static/plpgsql.html))，PL/Tcl ([第43章](https://www.postgresql.org/docs/10/static/pltcl.html))， PL/Perl ([第44章](https://www.postgresql.org/docs/10/static/plperl.html))，和 PL/Python ([第45章](https://www.postgresql.org/docs/10/static/plpython.html))。閱讀本章后， 你可以參考你最喜歡的程序語言的章節， 找出該程序語言的特定指引。

儘管大多數人認為觸發器函數比較容易用程序語言編寫， 觸發器也可以在C中編寫。 目前無法在SQL函數語言中編寫觸發器函數。


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