设计一个数据表字段选择界面。从数据表中选择字段添加到最右边的列表，如下图所示。数据表使用练习6中的student、teacher和course表。数据表只允许单选，字段允许多选。点击“>”按钮和 “<”按钮分别实现选中字段的添加和还原，点击“>>”按钮和“<<”按钮分别实现全部字段的添加和还原-Design a data table field selection interface. Select fields from the data table to the right of the list, as shown below. Use data tables to practice 6 student, teacher and course table. Data Sheet only radio, field allows multiple selections. Click on the ">" button and "<" button to add the selected field, respectively, to achieve and restore, click the ">>" button and "<<" button to add all the fields, respectively, to achieve and restore