MySQL 函數

時間函數
http://wen198599.pixnet.net/blog/post/22450019-mysql%E6%97%A5%E6%9C%9F%E5%92%8C%E6%99%82%E9%96%93%E5%87%BD%E6%95%B8%E4%B8%8D%E6%B1%82%E4%BA%BA


http://baike.baidu.com/view/2140086.htm


http://yangxinde.pixnet.net/blog/post/24490862-mysql-%E5%87%BD%E6%95%B8%E9%80%9F%E6%9F%A5%E8%A1%A8-(%E6%8C%89%E7%85%A7%E5%AD%97%E6%AF%8D%E9%A0%86%E5%BA%8F)-




http://www.oschina.net/code/snippet_54100_16



http://twpug.net/docs/mysql323/manual_Adding_functions.html


http://wen198599.pixnet.net/blog/post/22450019-mysql%E6%97%A5%E6%9C%9F%E5%92%8C%E6%99%82%E9%96%93%E5%87%BD%E6%95%B8%E4%B8%8D%E6%B1%82%E4%BA%BA


http://forum.heyxu.com/tw/p/010400/uxh6f64k


http://pcclass.cc.nthu.edu.tw/nuke/dbms.php?filename=function.html