Question

How to delete from database result of this query?
can you guys help me please

SELECT v.type
FROM poll_answers
JOIN vote_types v ON poll_answers.vote_id = v.id
JOIN poll_questions q ON q.id = poll_answers.question_id
WHERE q.referendum_id =1

I tried to remove it id one by one but it i had problems with foreign keys so I want to remove step by step

thank you

Answer 1

try this:

delete poll_answerpoll_answer,v,q,
FROM poll_answers
JOIN vote_types v ON poll_answers.vote_id = v.id
JOIN poll_questions q ON q.id = poll_answers.question_id
WHERE q.referendum_id =1

EDIT

mysql> delete poll_answers,v,q
    -> FROM poll_answers
    -> JOIN vote_types v ON poll_answers.vote_id = v.id
    -> JOIN poll_questions q ON q.id = poll_answers.question_id
    -> WHERE q.referendum_id =1;
Query OK, 0 rows affected (0.00 sec)