When querying a Django model, you may encounter a scenario where you need to perform a group by operation. Attempting to use .group_by() as you would in SQL results in an error.
Instead of using .group_by(), Django provides aggregation methods that allow you to perform complex queries involving groupings. Specifically, Count is useful for counting the occurrences of a particular field.
To group the results by designation and count the occurrences, you would use the following code:
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This query is similar to the following SQL statement:
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The output of the Django query would be in the form:
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