SQL Fiddle線上執行SQL語法的網站

http://sqlfiddle.com

自己做的DEMO:
http://sqlfiddle.com/#!6/8ac02/1/0

另外作者有把程式碼Open Source
程式碼
https://github.com/jakefeasel/sqlfiddle2

程式碼(舊版)
https://github.com/jakefeasel/sqlfiddle