Member Avatar for ANSAYLOR

Hello!
I am working on an SQL Database project and I am supposed to find the names of authors who have written 3 or more books. My code is below. The operator ">" is not valid and I have tried different variations of COUNT.

SELECT afirstname, alastname, btitle, COUNT(*) FROM Author, Book WHERE btitle > 2 GROUP BY alastname;

Author contains the names and Book contains the titles, pages, etc. There is also Author_Book containing aid and bid. Do I need to use a join? I still don't understand how I can specify 3+ books without using an operator. I am not asking for an answer, just some pointers if possible :).

Thank you!

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  • Latest Post Latest Post by pritaeas
Member Avatar for pritaeas

Have a look at using COUNT in HAVING.

Since btitle is a varchar column, you cannot compare it to an integer (it does not know you want to count).

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