Question

I have two tables Person and Interest

Person table structure

Id | Name

Interest table structure

Id | Person Id | Interest Category

My question is how do I get person who have a liking for the category ‘music’ AND ‘movie’ AND ‘sport’. The category will be dynamically.

So it will like using IN operator but by using AND condition not OR condition in the IN operator.

SELECT `Person Id` FROM Interest
WHERE `Interest Category` IN ('music', 'movie', 'sport');

Answer 1

You could use HAVING COUNT. The number would have to be dynamically too.

SELECT person_id
FROM interest
WHERE interest_category IN ( 'music', 'movie', 'sport');
GROUP BY person_id
HAVING COUNT(*) = 3;