[SQL]T-SQL LOCK Overviews

Ref:
WITH (NOLOCK)
http://blog.xuite.net/linriva/blog/39534686

LOCK Architecture
http://jackyshih.pixnet.net/blog/post/6154337-sql-server-lock-%E6%9E%B6%E6%A7%8B%E8%AE%80%E5%BE%8C%E5%BF%83%E5%BE%97