Suppose there is a SAS dataset with following values -
Parent Child
A B
B C
D E
F G
G H
H I
and so on…..
This goes onto 1000s of observations/rows.
Now how do we identify from this dataset Grandparents and
Grandchildrens ?
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Answer Posted / altumish
A simple self Join:
data old;
input Parent $ Child $;
cards;
A B
B C
D E
F G
G H
H I
I J
J K
J L
P S
;
Proc sql;
Select Old.parent as grandfather, Old.Child as father,
new.child as grandchild from work.Old as old, work.Old as new
where old.child = new.parent;
quit;
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