REFS:
http://souptonuts.sourceforge.net/readme_sqlite_tutorial.html@H_403_6@
http://www.sqlite.org/docs.html@H_403_6@
@H_403_6@
sql statement performance(这是好东西)
@H_403_6@http://help.adobe.com/en_US/as3/mobile/WS948100b6829bd5a6-58fee93d1274eb25dac-7ffb.html
