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Database management is one of the most crucial aspects of backend development. A properly optimized database can help to reduce the response time and hence lead to a better user experience. Understanding querysets in Django is the key to optimization, hence, please remember the following: Querysets are lazy, which means that no corresponding database request is made until you perform certain actions on the queryset, such as iterating over it. Database indexing is a technique for speeding up queries while retrieving records from a database.
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