MySQL join query using like?

Question

I have been trying to get this working for quite a while now but it just doesn't seem to work, maybe it is is not even possible, what i am wanting to do is to perform a MySQL join query using like, such as this example i found...

SELECT *
FROM Table1
INNER JOIN Table2 ON Table1.col LIKE '%' + Table2.col + '%'

but it just doesn't seem to work at all, any help that can be given would be brilliant, thanks !

Answer 1

Try

SELECT *
FROM Table1
INNER JOIN Table2 ON Table1.col LIKE CONCAT('%', Table2.col, '%')

MySQL does string concatenation differently from other databases, so in case you want to port your app, you need to have an alternate version where || is used as concatenation operator, as mentioned by Michael in another answer. This operator doesn't work in MySQL though, since it means or.