MySQL: can I do a for-each on a comma separated field?

Question

I just ran into a problem.

I know these integers, $integers: 3,5,15,20.

I only want to select the rows from this following table where all comma separated INT's from the field NUMBERS are found.

TABLE: number_table
Uid Numbers
------------------------
1   3,5,15    OK, since all of NUMBERS are in $integers
2   5,15,20   OK, since all of NUMBERS are in $integers
3   3,4,5,15  NOT OK, since 4 is not found in $integers
4   2,15,20,25  NOT OK, since 2 and 25 is not found in $integers

Is it possible to do a "for-each" on a comma separated string or another way to do this SELECT?

UPDATE: It sounds like this is not possible. I will leave it here for little while. Just a hint. When searching for something in a comma separated string then MySQL provides the WHEERE something IN (comma separated string). What I What I look for is someway to traverse a comma separated string using MySQL but that might not be possible.

Something like this would do it (pseudocode):

SELECT * FROM number_table WHERE each_commaseparated_substring(Numbers , 'IN (3,5,15,20)')

Answer 1

It should NOT be comma separated fields. It must be rows in the related table.

Answer 2

Maybe try with concate code using PHP and the implode() function.

Answer 3

I haven't tried this, and it's a bit ugly and quite possibly slow but you can try the following.

3,5,15,20

SELECT * FROM number_table
WHERE Numbers (LIKE '%,3,%' OR LIKE '%3,%') AND Numbers LIKE '%,5,%' AND Numbers LIKE '%,15,%' AND Numbers (LIKE '%,20,%' OR LIKE '%,20%')

You may be able to do something with REGEX. But at the very least you could use a stored procedure.

Updated for correctness