MySQL JOIN two tables using LIKE and substrings - mysql

Question

I have been trying to join two MYSQL tables with columns that contain a common substring.
My first table trim_table is a data set of substrings and its id. Each row contains an id, and a substring such as "1717 WINTON DR".
The second table wp_prop contains a columnfield_313 that may contain the substring found on the first table. An example value of field_313 would be "THE SARGENT III # 1717 WINTON DR"
The following is the query that I formulated to join both tables:
SELECT *, wp_prop.id as prop_id, trim_table.id as post_id, wp_prop.field_313
as prop_name, trim_table.trim_value as post_name
FROM
(SELECT id, TRIM(SUBSTRING(post_title, LOCATE('#', post_title)+1)) as trim_value
FROM wp_nd333j_posts WHERE post_type="fplan") as trim_table
JOIN
wp_nd333j_wpl_properties as wp_prop
ON trim_table.trim_value LIKE CONCAT('%', wp_prop.field_313, '%')
Unfortunately, the query does not return any rows. I have decomposed the query into different parts to verify that they work.
It is certain that the substring dataset returns the correct rows by executing the following query:
SELECT * FROM
(SELECT id, TRIM(SUBSTRING(post_title, LOCATE('#', post_title)+1)) as trim_value FROM wp_nd333j_posts WHERE post_type="fplan") as trim_table
I can also verify that my wp_prop table contains a substring similar to the example I posted above by executing the following query:
SELECT * FROM wp_nd333j_wpl_properties as wp_prop WHERE field_313 LIKE "%1717 WINTON DR%"
I also verified that my substring dataset contains my desired substring by executing the query:
SELECT * FROM
(SELECT id, TRIM(SUBSTRING(post_title, LOCATE('#', post_title)+1)) as trim_value FROM wp_nd333j_posts WHERE post_type="fplan") as trim_table
WHERE trim_value = "1717 WINTON DR"

Answer 1

You have just switch your fields in ON clause:
ON wp_prop.field_313 LIKE CONCAT('%', trim_table.trim_value, '%')
http://sqlfiddle.com/#!9/616a0/1
SELECT
trim_table.id as post_id,
trim_table.trim_value as post_name,
wp_prop.id as prop_id,
wp_prop.field_313 as prop_name
FROM (
SELECT id,
TRIM(SUBSTRING(post_title, LOCATE('#', post_title)+1)) as trim_value
FROM wp_nd333j_posts
WHERE post_type="fplan"
) as trim_table
INNER JOIN
wp_nd333j_wpl_properties as wp_prop
ON wp_prop.field_313 LIKE CONCAT('%', trim_table.trim_value, '%')