mysql - Wordpress SQL Query to combine column data for all rows -


i have wordpress plugin allows users save favorite posts. in wordpress mysql database, table looks following:

id     | user_id | post_id   -------+---------+------------ 1      | 1       | 3,4,5,6,7,8   2      | 2       | 5,7,8,10 3      | 5       | 3,6,8,10

i'm looking take post_id numbers, , combine them variable can foreach them find how many matches there current post i'm reading.

for example, if i'm reading post id 10, want able see there 2 people have saved favorites.

i've tried $data = $wpdb->get_var("select post_id $table_name"); , var_dump($data); returns my favorite posts, not all favorite posts.

although did play devils advocate in comments regarding normalization, table layout seem pretty braindead. however, if unable normalize database tables , have work have, can technically ask rather hacky sql statement:

 select count(user_id) totalwishes table_name (  (post_id 'n,%') or  (post_id '%,n,%') or  (post_id '%,n')  )

where n in example number of post.

i felt dirty writing that, in strictest interpretation of question, query should you're looking for.


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