How to Convert comma separated string as a sql table column

Example:- we need to convert the string "1212,23423,234,234234,254" as a-
Id
1212
23423
234
234234
254


First Create a custom  function in sql server database under Function -

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [dbo].[fnSplitter](@IDs Varchar(1000))
RETURNS @Tbl_IDs TABLE (ID Varchar(1000)) As

Begin
-- Append comma
Set @IDs = @IDs + ','
-- Indexes to keep the position of searching
Declare @Pos Int
Declare @Piece varchar(100)

if right(rtrim( @IDs),1) <> ','
-- Start from first character
Set @IDs = @IDs + ','
Set @Pos = patindex('%,%' , @IDs)
while @Pos <> 0
begin
Set @Piece = Left( @IDs, @Pos - 1)
Insert @Tbl_Ids Select Cast(@Piece as  Varchar(500)) 
-- Go to next non comma character
Set @IDs = stuff( @IDs, 1, @Pos, '')
-- Search from the next character
Set @Pos = patindex('%,%' , @IDs)
end
RETURN 
end


----------------------------------

Then execute the following query in sql server database, then you get above desire output-

select id from fnsplitter ('1212,23423,234,234234,234')


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