Answer Posted / sweety

Set : only support data without relation, with relation i.e
by statement it will produce error if we right like merge
statement.
Ex :
Set statement
data demo;
set dm1;
set dm2;
run;
It will produce the result same as merge , with or without
relation.

EX : data demo;
set dm1 dm2;
run;

It will produce error.

Merge : it will combine the datasets with or without
relation.

The only difference is set is not more efficient to combine
the datasets as we need to write set statement everytime.
Ex :

Merge (without relation)
data demo;
merge dm1 dm2;
run;

Merge (with relation)
data demo;
merge dm1 dm2;
by <variable name>
run;

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