CREATE TABLE Has_allergy (lname VARCHAR2, age VARCHAR2, StuID VARCHAR2, Allergy VARCHAR2)
CREATE TABLE Student (lname VARCHAR2, age VARCHAR2, StuID VARCHAR2, Allergy VARCHAR2)

Find the last name and age of the student who has allergy to both milk and cat.
SELECT lname, age FROM Student WHERE StuID IN (SELECT StuID FROM Has_allergy WHERE Allergy = "Milk" INTERSECT SELECT StuID FROM Has_allergy WHERE Allergy = "Cat")
SELECT "lname", "age" FROM "Student" WHERE "StuID" IN (SELECT "StuID" FROM "Has_allergy" WHERE "Allergy" = "Milk" INTERSECT SELECT "StuID" FROM "Has_allergy" WHERE "Allergy" = "Cat")