split function comma separator four columns SQL Se

Team,

i have another scenario, i need to split 4 columns and also 8 columns split,

i changed the beginning code

declare @numCols int = 4

i tried to change the final join statement, not able to achieve, Can you help on this.

i could not able to join the single join statement at the end of the function

declare @String varchar(max)
set @String='sunday,9,meals,EYR,sunday,9,meals,USD,monday,9,meals,USD,friday,9,meals,USD'
begin

  

declare @numCols int = 4
declare @itr int = 0
declare @SplittedValues table
(
    rowID int,
    colID int,
    Id varchar(50)  

)
    declare @SplitLength int, @Delimiter varchar(5)

    set @Delimiter = ','

    while len(@String) > 0
    begin 
        select @SplitLength = (case charindex(@Delimiter,@String) when 0 then
            len(@String) else charindex(@Delimiter,@String) -1 end)

        insert into @SplittedValues(rowID, colID, Id)
        select @itr / @numCols, @itr % @numCols, substring(@String,1,@SplitLength) 

        select @String = (case (len(@String) - @SplitLength) when 0 then  ''
            else right(@String, len(@String) - @SplitLength - 1) end)

        set @itr = @itr + 1
    end 


select * From @SplittedValues


select l.id as LeftId, r.id as RightId
from
(select rowid, id from @SplittedValues where colid = 0) l
join
(select rowid, id from @SplittedValues where colid = 1) r
on l.rowid = r.rowID

---need to join single statement 

select m.id as LeftId, n.id as RightId
from
(select rowid, id from @SplittedValues where colid = 2) m
join
(select rowid, id from @SplittedValues where colid = 3) n
on m.rowid = n.rowID



--return
END

Team, can you help 

I need to split 8 columns.

select * From dbo.EightColumnSplit(Sunday,9,USD,10,USD,Billable,Meals,25,Monday,9,USD,10,USD,Billable,Meals,25)

I need split columns like below 

 - Sunday,9,USD,10,USD,Billable, Meals,25
  
 - Monday,9,USD,10,USD,Billable,Meals,25

select * From dbo.TwoColumnSplit('Sunday,9,Monday,9,Tuesday,8,wed,9')

Create  function dbo.TwoColumnSplit
(
    @String varchar(max)
)
returns @returnTable table
(
    LeftId varchar(50)
    , RightId varchar(50)  
)
as
begin

declare @numCols int = 2
declare @itr int = 0
declare @SplittedValues table
(
    rowID int,
    colID int,
    Id varchar(50)  

)
    declare @SplitLength int, @Delimiter varchar(5)

    set @Delimiter = ','

    while len(@String) > 0
    begin 
        select @SplitLength = (case charindex(@Delimiter,@String) when 0 then
            len(@String) else charindex(@Delimiter,@String) -1 end)

        insert into @SplittedValues(rowID, colID, Id)
        select @itr / @numCols, @itr % @numCols, substring(@String,1,@SplitLength) 

        select @String = (case (len(@String) - @SplitLength) when 0 then  ''
            else right(@String, len(@String) - @SplitLength - 1) end)

        set @itr = @itr + 1
    end 

insert into @returnTable(LeftId, RightId)
select l.id as LeftId, r.id as RightId
from
(select rowid, id from @SplittedValues where colid = 0) l
join
(select rowid, id from @SplittedValues where colid = 1) r
on l.rowid = r.rowID

return
END