Show the values in one row with same id in sql - mysql

Question

I have Three tables and I join the table and retrieve all the values in this query
sql query:
SELECT wp_term_relationships.object_id, wp_posts.post_title,
wp_postmeta.meta_key, wp_postmeta.meta_value
FROM `wp_posts` , wp_postmeta, wp_term_relationships
WHERE (wp_posts.ID = wp_postmeta.post_id)
AND (wp_postmeta.post_id = wp_term_relationships.object_id)
AND wp_term_relationships.term_taxonomy_id =33
Its Show Table structure is this
object_id post_title meta_key meta_value
302 CHICKEN CHOW MEIN post_image url1
302 CHICKEN CHOW MEIN price 6.95
I want Show the OBject Id in one and merge the two rows in one column i want like this
object_id post_title meta_value(price) meta_value(post_image)
302 CHICKEN CHOW MEIN 6.95 url1

Answer 1

You could join to wp_postmeta twice, using more usual join syntax
SELECT rel.object_id, p.post_title,
meta_price.meta_key, meta_price.meta_value,
meta_image.meta_key, meta_image.meta_value
FROM `wp_posts` p
inner join wp_postmeta meta_price on meta_price.post_id = p.ID
inner join wp_postmeta meta_image on meta_image.post_id = p.ID
inner join wp_term_relationships rel on rel.objet_id = p.ID
WHERE rel.term_taxonomy_id = 33
and meta_price.meta_key = 'price'
and meta_image.meta_key = 'post_image'
(Syntax not checked – no access to a WordPress db here – and you'll need to change the selected columns slightly.)

Answer 2

If it was me, I'd simply stick with your existing query, and handle the pivot in the application code, so.
*PHP goes here*
$query = "
SELECT r.object_id
, p.post_title
, m.meta_key
, m.meta_value
FROM wp_posts p
JOIN wp_postmeta m
ON m.post_id = p.ID
JOIN wp_term_relationships r
ON r.object_id = m.post_id
WHERE r.term_taxonomy_id = 33
ORDER
BY post_title
, meta_key;
";
*More PHP goes here*

Answer 3

Syntax not checked, but something like this?
SELECT object_id, post_title, max(meta_key_price) as key_price, max(meta_key_image) as key_image FROM
(
SELECT
wp_term_relationships.object_id,
wp_posts.post_title,
case meta_key when 'price' then meta_value else null end as meta_key_price,
case meta_key when 'post_image' then meta_value else null end as meta_key_image
FROM `wp_posts` , wp_postmeta, wp_term_relationships
WHERE (wp_posts.ID = wp_postmeta.post_id)
AND (wp_postmeta.post_id = wp_term_relationships.object_id)
AND wp_term_relationships.term_taxonomy_id =33
) as t group by object_id