数据库在添加新功能的时候，如果需要改动数据库字段一般如何迁移数据
To change the fields in the table, check the syntax of ALTER TABLE and use SQL commands to modify it. Another method is to create a new table, import the old data into the new table, then delete the old table and rename the new table
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To change the fields in the table, check the syntax of ALTER TABLE and use SQL commands to modify it.
Another method is to create a new table, import the old data into the new table, then delete the old table and rename the new table