CREATE TABLE MINOR_IN (DNO VARCHAR2)
CREATE TABLE DEPARTMENT (DName VARCHAR2, DNO VARCHAR2)

Find the name of the department that has no students minored in?
SELECT DName FROM DEPARTMENT EXCEPT SELECT T1.DName FROM DEPARTMENT AS T1 JOIN MINOR_IN AS T2 ON T1.DNO = T2.DNO
SELECT "DName" FROM "DEPARTMENT" EXCEPT SELECT "T1"."DName" FROM "DEPARTMENT" "T1" JOIN "MINOR_IN" "T2" ON "T1"."DNO" = "T2"."DNO"