Hi all

Facing the following problem

In a record there is a field category.
Categories can be added/changed/removed

If I would use a fieldtype of set if would have been destructive in case a 
category got removed.

So I implemented by using a text type field and some extra validation 
routines.

Can this be done more directly and more INSIDE mysql?

Example data

id                      type                    
Page 1          category1,category2
Page 2          category3
Page 3          category2,category4

I currenlty do my selects with
SELECT `id` FROM `thetable` WHERE `type` LIKE '%category3%';

But I suspect speed and other penalties may arrise when the database is really  
in production.
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