Question

Assume this is the query I need:

SELECT * FROM `products` WHERE `keywords` LIKE "%(SELECT `key` FROM `keywords` WHERE `slug` = '%d8%af%db%8c%d9%88%d8%a7%d8%b1' LIMIT 1)%"

Currently it doesn’t work and returns zero results while there are records that satisfy the condition.
I wonder what is the problem here?

Answer 1

This should work:

SELECT * 
FROM products 
WHERE keywords LIKE
    CONCAT('%', (SELECT `key` FROM `keywords` 
        WHERE `slug` = '%d8%af%db%8c%d9%88%d8%a7%d8%b1' LIMIT 1), '%');