Unknown column error in this COUNT MySQL statement?

Question

Error is

Unknown column \'num\' in \'where\' clause

SELECT COUNT(*) AS num, books_bookid
FROM bookgenre_has_books
WHERE         


        

Answer 1

Try this, you should use the HAVING clause

SELECT COUNT(*) AS num, books_bookid
FROM bookgenre_has_books
GROUP BY books_bookid
HAVING COUNT(*) > 10

The SQL HAVING clause is used in combination with the SQL GROUP BY clause. It can be used in an SQL SELECT statement to filter the records that a SQL GROUP BY returns.