1. SQL set operators and modifiers.5
SQL set operators and modifiers.

2. Basic Syntax proc sql; select * from t1 intersect from t2 ; quit;
EXCEPT
UNION
OUTER UNION

3. Types of Set Operators
Set operators vertically combine rows from two result sets. There are four set operators:
Except
Union
Intersect
Outer Union

4. Default Behavior of Set Operators
Columns are matched by position and must be the same data type.
Column names in the final result set are determined by the first result set.
INTERSECT
EXCEPT
UNION
All columns from both result sets are selected.
OUTER UNION