Is there any SQL function / command to split a delimited string, or get the nth entry of such a string ?
AFAIR, there is an equivalent of substring(), usually something like MID, I think, but not of entry() ... but it has been a while.
There is substring and locate that you can use but not as easy as using entry
However, why don't you split that on the client once you've got the result set?... oh, wait... you might want to filter on entry(n, field) because at some point someone though it wouldn't hurt if we put everything we didn't thought of when designing the database in a dummy super field and use comma as 'logical' field separator