I am trying to Update a table with the description from another table
table 1 has two column  result_id   and  Description
table two has  2 columns,   codes   which =  result_id in  table one     and    meaning which = Description in table one
the problem is that  for each row in table 1  you may have multiple result_id  separated by commas
example   result_id = A124,C214,D214
I would like to lookup the result id from table 1 and return the meaning from table 2  to populate the description in table one.  I can write an update statement that works only when  there is a single result_id in table one. the problem is when i have multiple return_id per row