用PB讲解数据库应用技术，标准老师课堂讲课讲义，内容生动（还有老师弄得例子在里面），从登陆界面一直到基本信息库都有涵盖；去享受吧~！-Explained with the PB database, application technology, standards, teacher lectures notes, the contents of a lively (and also confused examples in which the teacher), from landing to