Need help with merging rows

Question

Howdy all,
Given the following data set...
ID   GROUP_ID   AWESOME   MOD_DATE    LAST_NAME        FIRST_NAME
52   98              1              2/1/2011       Kirk                    James
60   99              1              2/2/2011       Kirk                    James
42   45              0              1/29/2011     Kirk                    James
100  31             1             6/24/2011      Smurf                 Papa
200  32             1             6/23/2011      Smurf                 Papa
300  33             0             6/22/2011      Smurf                 Papa
400  34             0             6/21/2011     Smurf                  Papa for those with the same last_name and first_name,
where AWEAOME=0,
I want to overwrite their GROUP_ID with the grou_ID where AWESOME=1
and the latest DOM_DATE.
So for James Kirk, his group_id of 45 will be set the 99
and for Papa Smurf, his group_ids of 33 and 34 will be set to group_id 31
Desired result
ID   GROUP_ID   AWESOME   MOD_DATE    LAST_NAME   FIRST_NAME
52   98             1              2/1/2011         Kirk              James
60   99             1              2/2/2011        Kirk              James
42   99             0             1/29/2011       Kirk              James
100  31            1             6/24/2011       Smurf             Papa
200  32            1             6/23/2011      Smurf             Papa
300  31            0             6/22/2011      Smurf             Papa
400  31            0             6/21/2011      Smurf             Papa thanks

Answer 1

Something like
UPDATE table_name dest
   SET group_id =
    (SELECT group_id
       FROM (
        SELECT group_id,
               mod_date,
               first_name,
               last_name,
               max( mod_date ) over (partition by last_name, first_name) last_mod_date
           FROM table_name src_inner
          WHERE src_inner.awesome = 1 ) src_outer
      WHERE src_outer.last_mod_date = src_outer.mod_date
        AND src_outer.first_name = dest.first_name
        AND src_outer.last_name = dest.last_name )
WHERE awesome = 0;should work. This assumes that there is always at least 1 row where AWESOME=1 and the name matches for every row where AWESOME=0. And it assumes there are no duplicates where the same name with AWESOME=1 have the same maximum MOD_DATE.
Justin