Question

+----+-------+---------+------+--------+--------+
|q_id|q_title|q_content|q_date|q_status|q_author|
+----+-------+---------+------+--------+--------+
| 1  |varchar| text    | int  |   int  |   int  |
+----+-------+---------+------+--------+--------+

This is the first table: questions.
Tags table has this structure:

+------+--------+---------------+
|tag_id|tag_name|tag_description|
+------+--------+---------------+
| int  |varchar |     text      |
+------+--------+---------------+

And the third table (question_tags) has this structure:

+----+--------+------+
| id | tag_id | q_id |
+----+--------+------+
|int |  int   | int  |
+----+--------+------+

The last table (users) has this structure:

+----+----------+--------+
| id | username |password|
+----+----------+--------+
|int | varchar  |varchar |
+----+----------+--------+

I used to select the data with this query:

SELECT * , GROUP_CONCAT( tags.tag_name ) 
FROM questions 
LEFT JOIN users 
ON q_author = users.id 
LEFT JOIN question_tags 
ON questions.q_id = question_tags.q_id 
LEFT JOIN tags ON tags.tag_id = question_tags.tag_id 
GROUP BY questions.q_id

But it doesn’t satisfy my needs anymore. Also please notice that in the question_tags table you can have more than one tag per question and I want to get all tags and their IDs.

Answer 1

The query is correct. If you want the IDs of tags:

SELECT * , GROUP_CONCAT( CONCAT(tags.tag_id,'=',tags.tag_name)) 

How do you want the output to look?