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

Find the name of customers who have more than one loan.
SELECT T1.cust_name FROM customer AS T1 JOIN loan AS T2 ON T1.cust_id = T2.cust_id GROUP BY T1.cust_name HAVING COUNT(*) > 1
SELECT "T1"."cust_name" FROM "customer" AS "T1" JOIN "loan" AS "T2" ON "T1"."cust_id" = "T2"."cust_id" GROUP BY "T1"."cust_name" HAVING COUNT(*) > 1