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

Find the the name of the customers who have a loan with amount more than 3000.
SELECT T1.cust_name FROM customer AS T1 JOIN loan AS T2 ON T1.cust_id = T2.cust_id WHERE amount > 3000
SELECT "T1"."cust_name" FROM "customer" "T1" JOIN "loan" "T2" ON "T1"."cust_id" = "T2"."cust_id" WHERE "amount" > 3000