Select Query Oracle PLSQL

SQL> CREATE TABLE customers
  2  (
  3     id                NUMBER,
  4     lname         VARCHAR2(40)   CONSTRAINT           customer_lname_nn NOT NULL,
  5     main_phone_number VARCHAR2(25),
  6     credit_limit      NUMBER,
  7     email             VARCHAR2(30)
  8  );
Table created.
SQL> select lname, credit_limit
  2  from   customers
  3  where  lname like 'Q%';
no rows selected
SQL>
SQL> drop table customers;
Table dropped.