I have a postgresql table with columns that have repeating data like this which was created using a django model:
In order to get distinct values of a column, we use a postgre command something like this:
SELECT distinct degree_code FROM studentapp_deg_course_cat
But i want to get this data as an array using python. How do i get distinct objects from the columns of a table in python?
In django you can use the distinct()
method when querying your model.
So something like this
models.YourModel.objects.order_by('degree_code').distinct('degree_code')
As you are using PostgreSQL note the docs which state
On PostgreSQL only, you can pass positional arguments (*fields) in order to specify the names of fields to which the DISTINCT should apply. This translates to a SELECT DISTINCT ON SQL query. Here's the difference. For a normal distinct() call, the database compares each field in each row when determining which rows are distinct. For a distinct() call with specified field names, the database will only compare the specified field names.
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