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Help bind the database in the GridView and update it?

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Post time: 2020-1-3 13:00:01
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The database that I bind in the GridView has 3 tables, and the relationship between the 3 tables is as follows:
的 The fields in student include student number, name, class number, and professional number;
The fields in the table class include class and class number;
The fields in the table zhuanye have professional, professional number;
However, the columns I bind in the GridView are: student number name class professional
Now I want to update records in the GridView, how should I write the update statement?
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