Question

Is it good if i write query like this:- (see query in where condition)

SELECT distinct(id) "idea_id" 
FROM ideas 
WHERE deleted_by_user = 0 AND moderation_flag = 1 AND 
user_id in (select id 
            from users 
            where confirm like "yes") 
ORDER BY time_of_creation DESC

let me know if there is some issue in this query :
thanx in advance..

Answer 1

You can wirte this query in two ways:

SELECT DISTINCT(i.id) "idea_id" 
FROM ideas i 
INNER JOIN users u ON i.user_id = u.id 
WHERE i.deleted_by_user = 0 AND i.moderation_flag = 1 AND u.confirm = 'yes' 
ORDER BY i.time_of_creation DESC;

And

SELECT DISTINCT(i.id) "idea_id" 
FROM ideas i 
WHERE i.deleted_by_user = 0 AND i.moderation_flag = 1 AND 
EXISTS (SELECT * FROM users u WHERE i.user_id = u.id  AND u.confirm = 'yes')
ORDER BY i.time_of_creation DESC;