Turning one column into a string in SQL

Question

I have a table in SQL that look like this:

The issue is that I would like it to be displayed in this fashion:

Medication Review | Allergies, CAM, Diet Supp, 

Having one presenting problem and all of the secondary problems in a single row instead of the way it is now.

Any help would be awesome! Thanks!

Answer 1

If you are using SQL Server, you can do this:

SELECT DISTINCT t1.presenting_problem,
  STUFF(
         (SELECT ', ' + t2.secondary_problem
          FROM tableName t2
          where t1.presenting_problem = t1.presenting_problem
          FOR XML PATH (''))
          , 1, 1, '')  AS secondary_problems
from tableName t1;