ADO数据控件，属性设置与数据库的连接，DataGrid控件的使用，DataGrid控件的AllowAddNew、AllowDelete和AllowUpdate属性的作用，使用数据窗体向导自动构成数据访问窗体。双表查询，禁止在浏览中数据被修改，统计数据库中各专业的人数，按平均成绩统计前8名和按专业排列高数平均成绩的操作。数据窗体向导产生主表／细表形式窗体。把数据库放到桌面。-ADO data control, set the connection to the database attribute, DataGrid control, use, DataGrid control AllowAddNew, AllowDelete and AllowUpdate the role of property, the use of Data Form Wizard automatically constitute a data access form. Two-table query to prohibit the data is modified in the browser, statistical database, the number of professional, according to average scores by the top 8 and the high number of average scores and the alignment operation. Data Form Wizard to generate the main table/small table in the form form. The database on the desktop. Ha ha