1. http://blog.csdn.net/syy19930112/article/details/7907845
2. http://database.51cto.com/art/200510/9321.htm
3. http://database.51cto.com/art/200611/35072.htm
4. http://big5.webasp.net/article/22/21199.htm
5. http://database.51cto.com/art/201009/228048.htm
6. http://rritw.com/a/JAVAbiancheng/ANT/20120429/161283.html
7. http://dba.tw/index.php?topic=27.0
8. http://hi.baidu.com/jrc520/item/f3c2bc84e4f966d45f0ec173
9. http://tw.wingwit.com/Article/program/Oracle/201311/19095.html
10. PL/SQL 例外處理
http://docs.oracle.com/cd/B19306_01/appdev.102/b14261/errors.htm