SELECT Column1 FROM tablename in Django

Okay I know this is really stup开发者_Python百科id.But how to i write SELECT Column1 FROM tablename I know i can use Court.objects.all()[0] to get just one row.But how do I get one column only(the whole column values).Am I missing something?

Also in Court.objects.all()[0] isn't it first retrieved and then spliced.So isn't it kinda inefficient.

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Court.objects.values_list('column_name', flat=True)

And if you write Court.objects.all()[0] only one row is retireved.

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Court.objects.only('column_name')