I do recommend this method, I use it with all my datastores and it makes it far easier to store and sort data.
Ill break it down so you can see how I use it.
----------- // Individual Values
local Val1 = 10 -- First value
local Val2 = 20 -- Second Value
local Combined = tostring(Val1) .. ";Split;" .. tostring(Val2)
------------ // Arrays
local ArrayVersion = {10,20}
local Combined = ""
local Combined = table.concat(ArrayVersion,";Split;")
------------ // Getting The Values Back Out
local Data = "10;Split;20"
local SplitVer = string.split(Data,";Split;")
-- This will give you an array to use so I recommend using arrays-
-- To start with