added dbstructure.
added dbstructure.

ddong8/ihasy,fe11x/F2E.im,bukun/ogcc,arrti/myF2E,bukun/ogcc,metal88888/F2E.im,wangjun/F2E.im,bukun/ogcc,ddong8/ihasy,hitrust/F2E.im,metal88888/F2E.im,arrti/myF2E,PaulGuo/F2E.im,wangjun/F2E.im,ddong8/ihasy,metal88888/F2E.im,fe11x/F2E.im,bukun/ogcc,hitrust/F2E.im,PaulGuo/F2E.im,wangjun/F2E.im,bukun/ogcc,hitrust/F2E.im,fe11x/F2E.im,arrti/myF2E