Show products that are more expensive than average : Single Row Subquery « Query Select « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. Query Select
3. Single Row Subquery

SQL>
SQL> CREATE TABLE product (
  2       product_name     VARCHAR2(25) PRIMARY KEY,
  3       product_price    NUMBER(4,2),
  4       quantity_on_hand NUMBER(5,0),
  5       last_stock_date  DATE
  6       );

Table created.

SQL>
SQL> INSERT INTO product VALUES ('Product 1', 99,  1,    '15-JAN-03');

1 row created.

SQL> INSERT INTO product VALUES ('Product 2', 75,  1000, '15-JAN-02');

1 row created.

SQL> INSERT INTO product VALUES ('Product 3', 50,  100,  '15-JAN-03');

1 row created.

SQL> INSERT INTO product VALUES ('Product 4', 25,  10000, null);

1 row created.

SQL> INSERT INTO product VALUES ('Product 5', 9.95,1234, '15-JAN-04');

1 row created.

SQL> INSERT INTO product VALUES ('Product 6', 45,  1,    TO_DATE('December 31, 2008, 11:30 P.M.','Month dd, YYYY, HH:MI P.M.'));

1 row created.

SQL>
SQL> SELECT * FROM product
  2  WHERE  product_price > (SELECT AVG(product_price) FROM product);

PRODUCT_NAME              PRODUCT_PRICE QUANTITY_ON_HAND LAST_STOC
------------------------- ------------- ---------------- ---------
Product 1                            99                1 15-JAN-03
Product 2                            75             1000 15-JAN-02

SQL>
SQL>
SQL> drop table product;

Table dropped.

SQL>