Describe the Django ORM and its advantages.
Instruction: Explain what the Django ORM is and why it's beneficial for developers.
Context: With this question, the candidate's understanding of the Object-Relational Mapping (ORM) system in Django and its advantages over writing raw SQL is evaluated.
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Django's ORM maps model objects and query expressions to supported database operations. It provides composable filtering, relationships, aggregation and transaction APIs, which can make common data access easier to maintain than repeated handwritten SQL.
A QuerySet is generally lazy: constructing a filter does not immediately retrieve rows. Iteration and other evaluation operations execute the query. This allows a view to add visibility filters and ordering before retrieval...
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