What's wrong with the query?

Question

What's wrong with the query?

delete from categories c
left join categories_products cp on cp.category_id = c.id
left join products p on p.id = cp.product_id
left join images i on i.object_id = cp.product_id
where c.id = 3 and i.site_section = 'products'

MySQL returns error. I'm trying to execute this query through the HeidiSQL. Error is unknown.

Another question, which will also help me: how can I make cascade deletion of row if I have no indexes?

Answer 1

you should add the alias after the delete keyword

DELETE c FROM categories c
          LEFT JOIN categories_products cp 
                    on cp.category_id = c.id
          LEFT JOIN products p 
                    on p.id = cp.product_id
          LEFT JOIN images i on i.object_id = cp.product_id
WHERE c.id = 3 and i.site_section = 'products'