SQL count function not working properly in view

Question

I've created a view to query on but does not seem to be working properly. Code:

    CREATE VIEW SpeciesTypes AS
    SELECT species.Name, count(animal.animalID) as number_of_animals
    FROM zoo.species, zoo.animal
    WHERE species.speciesID = animal.speciesID
    GROUP by Name

This code shows each species name and the number of animals within each species. However, i am trying to write a query in finding out which species has the most number of animals including the species name .

The query that i used was:

    SELECT name, max(number_of_animals)
    FROM speciestypes;

This showed me correct highest number of animals but the species name does not change.. does anyone know how to fix this? Thanks!

Answer 1

If you want to get the name of the species having the greatest number of animals, using your view you can just use a WHERE clause to restrict the result set.

SELECT t.name,
       t.number_of_animals
FROM SpeciesTypes t
WHERE t.number_of_animals = (SELECT MAX(number_of_animals) FROM SpeciesTypes)