Merge two tables / concatenate values into single column

Question

I have two tables: table A holds master product data, and table B holds children product data. I would like to update table A to hold the same value of the identical column

Answer 1

I think this will do it:

SELECT parent_id AS ID, 
  STUFF((
    SELECT ','+color FROM TableB a WHERE a.parent_id = b.parent_id FOR XML PATH('')
  ),1,1,'') AS color,
  STUFF((
    SELECT ','+Location FROM TableB a WHERE a.parent_id = b.parent_id FOR XML PATH('')
  ),1,1,'') AS Location,
FROM TableB b
GROUP BY parent_id