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Start your free trialKawaljeet Singh
3,820 PointsGROUP BY
In the library database there's a books table. There are id, title, author, genre and first_published columns.
Write a query to count all the unique genres in the books table. Alias it as total_genres.
My Answer- select COLUMN(DISTINCT genre) AS "total_genre" from books GROUP BY genre PLease highligh my mistake and explain the answer. Thank you
1 Answer
Steven Parker
231,184 PointsThe challenge error message contained a hint: "Bummer: You're missing the COUNT() function."
That's one of three issues:
- you have "COLUMN" instead of "COUNT"
- you have "total_genre" (singular) but the instructions asked for "total_genres"
- you don't need GROUP BY for this
Kawaljeet Singh
3,820 PointsKawaljeet Singh
3,820 PointsHi I still tried but its not proper answer. select COUNT(DISTINCT genre) AS total_genres from books GROUP BY genre;
Steven Parker
231,184 PointsSteven Parker
231,184 PointsKawaljeet Singh — Ooops, I forgot there was a third issue. I updated my answer.
Did you get it now?