How do I get all combinations of data from a MySQL table?

Question

I have spent the last five hours trying to get every product option combination from a table but I\'m totally stuck now. I have a table with data like (simplified):

Answer 1

Given your table... I'm assuming you want every possible combo of value and option. That's a cross join (a join without any ON or where clause limiting the results):

 SELECT a.value_id, b.option_id 
     FROM assigned_options a 
     JOIN assigned_options b 
     GROUP BY a.value_id, b.option_id 

The group by filters out the duplicate results.

Do you have 2 other tables value and option that you want to pull all combinations of?