SQL与HQL方面问题

SQL：

http://www.iteye.com/topic/465807

http://www.iteye.com/topic/641240

http://www.iteye.com/topic/898420

http://www.iteye.com/topic/438756

http://www.iteye.com/topic/111811

http://www.iteye.com/topic/119159

http://www.iteye.com/topic/185385

http://www.iteye.com/topic/47875

http://blog.163.com/xiaokangzhijia@126/blog/static/1659548562010112784632965/

?

HQL:

http://www.iteye.com/topic/824531

http://blog.163.com/xiaokangzhijia@126/blog/static/1659548562010112781713107/

http://zhaohe162.blog.163.com/blog/static/3821679720101110659427/?suggestedreading&wumii