I recently had an AlaSQL related question that dealt with a comma delimited string. @Kabirdas came up with a bit of syntax that solved my problem. To be honest I have no idea how or why it worked, but it may give you a string to pull and solve your problem:
The other option would be to use a transformer on your SQL to post process the results, looping through each record and using .split() to convert your string into an array.