#1242 - Subquery returns more than 1 row - mysql

Question

I am trying to make a select statement that selects the image names from a MySQL database. The table is called - pictures_archive. I am also trying to select these pictures

Answer 1

SELECT pictures_archive_filename FROM pictures_archive 
WHERE pictures_archive_id = (SELECT pictures_archive_id 
FROM pictures_archive_category WHERE pictures_category_id = 9 LIMIT 1)