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Suppose an object-relational mapping(ORM) library syncs a database from source code models. What is an advantage of supporting migrations of existing tables? 1. To populate

Suppose an object-relational mapping(ORM) library syncs a database from source code models. What is an advantage of supporting migrations of existing tables?

1. To populate text fixtures

2. To guarantee test database schemas match the production schema

3. Faster creation of test databases

4. To allow additional constraints on the tables

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