Converting comma delimited string to multiple columns in sql server

Question

I want to extract specific strings separated by a comma and parse across the specific columns in SQL server 2008. The table structure in SQL server is as follows:

Answer 1

With the help of a Split function:

CREATE FUNCTION [dbo].[SplitStrings]
(
   @List       VARCHAR(MAX),
   @Delimiter  CHAR(1)
)
RETURNS TABLE
AS
   RETURN ( SELECT Item FROM ( SELECT Item = x.i.value('(./text())[1]', 'varchar(max)') 
      FROM  ( SELECT [XML] = CONVERT(XML, '' + REPLACE(@List, @Delimiter, '') 
              + '').query('.') ) AS a CROSS APPLY [XML].nodes('i') AS x(i)
          ) AS y WHERE Item IS NOT NULL
   );
GO

You can do it this way:

;WITH x AS
(
    SELECT s.*, f.Item
        FROM #samp AS s
        CROSS APPLY dbo.SplitStrings(s.COMMASEPA, ',') AS f
), p AS 
( 
    SELECT x.COMMASEPA, 
        X = MAX(CASE WHEN x.Item LIKE 'X=%' THEN x.Item END),
        Y = MAX(CASE WHEN x.Item LIKE 'Y=%' THEN x.Item END),
        Z = MAX(CASE WHEN x.Item LIKE 'Z=%' THEN x.Item END),
        A = MAX(CASE WHEN x.Item LIKE 'A=%' THEN x.Item END),
        B = MAX(CASE WHEN x.Item LIKE 'B=%' THEN x.Item END),
        C = MAX(CASE WHEN x.Item LIKE 'C=%' THEN x.Item END),
        D = MAX(CASE WHEN x.Item LIKE 'D=%' THEN x.Item END)
    FROM x GROUP BY x.COMMASEPA
)
UPDATE s SET X = p.X, Y = p.Y, Z = p.Z, 
  A = p.A, B = p.B, C = p.C, D = p.D
FROM #samp AS s INNER JOIN p 
ON p.COMMASEPA = s.COMMASEPA;