Question

I have 2 tables – posts and postmeta.

posts
ID   title   category  post_status  post_type    

1    ABC      cat-1    Publish      Store
2    DEF      cat-2    Publish      Store
3    GHI      cat-3    Publish      Store
4    JKL      cat-2    Publish      Store
5    XYZ      cat-5    Draft        Store
6    MNO      cat-9    Publish      Article

and

postmeta
meta_id post_id  meta_key    meta_value

109       1       city          1
110       1       featured      h
111       2       city          1,2
112       2       featured      both
113       3       city          2,3
114       3       featured      both
115       4       city          1
116       4       featured      n
117       5       city          1,4
118       5       featured      h 
119       6       city          1
120       6       featured      h

I am trying to run a query that would give me a list of posts which has the following conditions:

1. Whose value against city has 1 AND
2. whose value for featured is either h or both AND
3. whose post status is Publish AND
4. whose post type is Store
5. Order them by title

The query I am trying is

SELECT DISTINCT posts.ID , posts.*, postmeta.*
            FROM posts, postmeta
            WHERE posts.ID = postmeta.post_id
            AND (postmeta.meta_value  = 'h' OR postmeta.meta_value = 'both') 

AND (postmeta.meta_key = 'post_city_id' AND (postmeta.meta_value LIKE '%,1,%' OR postmeta.meta_value LIKE '%1,%'  OR postmeta.meta_value LIKE '%,1%' OR postmeta.meta_value LIKE '%1%'))

            AND posts.post_status = 'Publish' 
            AND posts.post_type = 'Store'

            ORDER BY (SELECT postmeta.meta_value from postmeta where (posts.ID = postmeta.post_id) and postmeta.meta_key LIKE '%home_featured_type%') asc, posts.post_title LIMIT 0,6

The correct returns would be IDs 1 and 2 i.e. abc and def. But I am getting empty result. I cannot figure out where it is falling apart. How can this be fixed?

Answer 1

here is a fixed query, but I still don’t understand the mysterious ORDER BY (SELECT) thingie.

http://sqlfiddle.com/#!2/5ce5a/19

SELECT DISTINCT posts.ID , posts.*, postmeta_city.*, postmeta_featured.*

FROM       posts

INNER JOIN postmeta AS postmeta_city
     ON     postmeta_city.post_id = posts.ID
    AND     postmeta_city.meta_key = 'city'
    AND (   postmeta_city.meta_value LIKE '%,1,%'
         OR postmeta_city.meta_value LIKE '%1,%'
         OR postmeta_city.meta_value LIKE '%,1%'
         OR postmeta_city.meta_value LIKE '%1%'
        )
INNER JOIN postmeta AS postmeta_featured
     ON     postmeta_featured.post_id = posts.ID
    AND     postmeta_featured.meta_key = 'featured'
    AND (   postmeta_featured.meta_value = 'h'
         OR postmeta_featured.meta_value = 'both'
        )

WHERE posts.post_status = 'Publish' 
  AND posts.post_type = 'Store'

ORDER BY (
    SELECT postmeta.meta_value
    FROM postmeta
    WHERE ( posts.ID = postmeta.post_id )
      AND postmeta.meta_key LIKE '%home_featured_type%'
  ) asc,
  posts.title

LIMIT 0,6;
;

Updated with other people’s ideas, please upvote them:

http://sqlfiddle.com/#!2/5ce5a/33

SELECT DISTINCT posts.ID , posts.*, postmeta_city.*, postmeta_featured.*

FROM       posts

INNER JOIN postmeta AS postmeta_city
     ON postmeta_city.post_id = posts.ID
    AND postmeta_city.meta_key = 'city'
    AND FIND_IN_SET('1', postmeta_city.meta_value)

INNER JOIN postmeta AS postmeta_featured
     ON postmeta_featured.post_id = posts.ID
    AND postmeta_featured.meta_key = 'featured'
    AND postmeta_featured.meta_value IN ('h','both')

WHERE posts.post_status = 'Publish' 
  AND posts.post_type = 'Store'

ORDER BY (
    SELECT postmeta.meta_value
    FROM postmeta
    WHERE ( posts.ID = postmeta.post_id )
      AND postmeta.meta_key LIKE '%home_featured_type%'
  ) asc,
  posts.title

LIMIT 0,6;
;