The 'F' expression in Django allows for direct database operations on fields, improving efficiency by avoiding data transfers between the database and Python.
Using 'F' expressions is particularly beneficial when you want to perform updates without retrieving values into memory, thus minimizing database round-trips and improving performance.
Utilizing the 'F()' object can also reduce race conditions during concurrent updates, making it ideal for handling large datasets effectively.
When calculating values based on other fields, like a final price with discounts, the 'F' expression allows these updates to be made efficiently at the database level.
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