Understand and perform database migration.

了解和执行数据库迁移。

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To see exactly what the migration does, just run it and look at the database.

要准确地看到迁移做的工作，只需运行迁移并查看数据库。

youdao

To see exactly what the migration does, just run it and look at the database.

要准确地看到迁移做的工作，只需运行迁移并查看数据库。

youdao