CREATE TABLE customer (cust_name VARCHAR2, cust_id VARCHAR2)
CREATE TABLE loan (cust_id VARCHAR2)

Find the name of customers who have loans of both Mortgages and Auto.
SELECT T1.cust_name FROM customer AS T1 JOIN loan AS T2 ON T1.cust_id = T2.cust_id WHERE loan_type = 'Mortgages' INTERSECT SELECT T1.cust_name FROM customer AS T1 JOIN loan AS T2 ON T1.cust_id = T2.cust_id WHERE loan_type = 'Auto'
SELECT "T1"."cust_name" FROM "customer" "T1" JOIN "loan" "T2" ON "T1"."cust_id" = "T2"."cust_id" WHERE "loan_type" = 'Mortgages' INTERSECT SELECT "T1"."cust_name" FROM "customer" "T1" JOIN "loan" "T2" ON "T1"."cust_id" = "T2"."cust_id" WHERE "loan_type" = 'Auto'