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What is the main purpose of using select_related in Django queries?

easy📝 Conceptual Q11 of 15
Django - Caching
What is the main purpose of using select_related in Django queries?
ATo reduce the number of database queries by joining related tables
BTo create new database tables automatically
CTo delete related objects from the database
DTo update multiple records at once
Step-by-Step Solution
Solution:

  1. Step 1: Understand what select_related does

    select_related is used to fetch related objects in a single database query by joining tables.

  2. Step 2: Identify the main benefit

    This reduces the number of queries and improves performance when accessing related data.

  3. Final Answer:

    To reduce the number of database queries by joining related tables -> Option A

  4. Quick Check:

    select_related reduces queries = D [OK]
Quick Trick: Remember: select_related joins tables to reduce queries [OK]
Common Mistakes:
MISTAKES
  • Thinking select_related creates or deletes tables
  • Confusing select_related with update or delete operations
  • Assuming select_related works for many-to-many relations

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