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Ruby on Rails - .distinct (or .uniq) ruby on rails- ruby on rails tutorial - rails guides - rails tutorial - ruby rails

If we want to remove duplicates from a result, we can use .distinct():

Customers.select(:country).distinctClicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy - ruby on rails tutorial - rails guides - ruby rails - rubyonrails - learn ruby on rails - team

This queries the database given below:

SELECT DISTINCT "customers"."country" FROM "customers"Clicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy - ruby on rails tutorial - rails guides - ruby rails - rubyonrails - learn ruby on rails - team

.uniq() has the same effect. With Rails 5.0 it got deprecated and it will be removed from Rails with version 5.1.
The reason is, that the word unique doesn't have the same meaning as distinct and it can be misleading.
Furthermore distinct is closer to the SQL syntax.

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