keeping only one value

[kindbe17]

Could you please help me to keep only first value "David" from the data, using if last if first, 

data readin;
input ID Name $ Score;
cards;
1 David 45
1 David 74

1 David 77
;
run;

[PeterClemmensen · Accepted solution]

data readin;
input ID Name $ Score;
cards;
1 David 45
1 David 74
1 David 77
;
run;


data want;
   set readin;
   by Name;
   if first.Name;
run;