Question

I try to do 2 delete queries in one. For example:

DELETE FROM `comments` WHERE `article_id` = 4;
DELETE FROM `aricles` WHERE `id` = 4;

I tried using a single query:

DELETE `articles`, `comments` 
FROM `articles` INNER JOIN `comments` 
WHERE `comments`.`article_id` = `articles`.`id` AND `articles`.`id` = 4

That works well if in table comments exist records with article_id 4, but doesn’t remove articles records with articles.id = 4, if in comments records with article_id = 4 not found. Is there any way to do that?

Answer 1

This will do it –

DELETE `articles`, `comments`
FROM `articles`
LEFT JOIN `comments`
    ON `articles`.`id` = `comments`.`article_id`
WHERE `articles`.`id` = 4;