Walk the string

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declare @S varchar(20)
set @S = '1,2,3,4,5'
declare @l varchar(20)

while len(@S) > 0
begin
  --print left(@S, charindex(',', @S+',')-1)
  set @l = left(@S, charindex(',', @S+',')-1)
  print @l
  set @S = stuff(@S, 1, charindex(',', @S+','), '')
end

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