how to delete the duplicate columns permanently in SQL
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Answer Posted / naveen
data aaa;
input P_Id LastName $ FirstName $ City $;
cards;
1 Hansen Ola Sandnes
2 Svendson Tove Sandnes
3 Pettersen Kari Stavanger
;
run;
proc sql;
select distnict(city)
from aaa;
quit;
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