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Start your free trialCaleb Newell
12,562 PointsWrite a query to count all the unique genres in the books table. Alias it as total_genres.
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.
When i put in the query i wrote, it sais, "Your'e query did not preform the correct count."
help is much appreciated :)
Caleb Newell
12,562 PointsSorry, I don' know why my code did not show up earlier.
SELECT DISTINCT genre, COUNT(*) AS toatal_genres FROM books;
1 Answer
Steven Parker
231,124 PointsThere seems to be a few issues:
- the instructions only ask for a total count, not a list of genres
- the "count" needs to be distinct, not the select
- the alias is set to "toatal_genres" (with an extra "a") instead of "total_genres"
SELECT COUNT(DISTINCT genre) AS total_genres FROM books;
Steven Parker
231,124 PointsSteven Parker
231,124 PointsPlease show the query you were entering.