Making queries DISTINCT
You've learned that the DISTINCT keyword can be used to return unique values in a field.
The books table contains 350 books, representing all of the books that our local library has available for checkout.
But how many different authors are represented in these 350 books?
Latihan ini adalah bagian dari kursus
Introduction to SQL
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
-- Select unique authors from the books table
SELECT ___
FROM ___;