1.并集
SELECT Name FROM Person_1 UNION SELECT Name FROM Person_2
2.交集
SELECT Name FROM Person_1 INTERSECT SELECT Name FROM Person_2
3.差集
SELECT Name FROM Person_1 EXCEPT SELECT Name FROM Person_2
1.并集
SELECT Name FROM Person_1 UNION SELECT Name FROM Person_2
2.交集
SELECT Name FROM Person_1 INTERSECT SELECT Name FROM Person_2
3.差集
SELECT Name FROM Person_1 EXCEPT SELECT Name FROM Person_2