aggregate function and group by clause : GROUP Function « Aggregate Functions « Oracle PL / SQL

1. Oracle PL / SQL
2. Aggregate Functions
3. GROUP Function

aggregate function and group by clause

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

Table created.

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

1 row created.

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

1 row created.

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

1 row created.

SQL>
SQL>
SQL>
SQL>
SQL> SELECT SUBSTR(product_name, 1, 15) "Product",
  2         SUM(quantity_on_hand) "Total Sold",
  3         AVG(quantity_on_hand) "Average",
  4         COUNT(quantity_on_hand) "Transactions",
  5         MIN(quantity_on_hand) "Fewest",
  6         MAX(quantity_on_hand) "Most"
  7  FROM   product
  8  GROUP BY product_name;

Product         Total Sold    Average Transactions     Fewest       Most
--------------- ---------- ---------- ------------ ---------- ----------
Product Number         100        100            1        100        100
Medium Widget         1000       1000            1       1000       1000
Small Widget             1          1            1          1          1

SQL>
SQL>
SQL>
SQL> DROP TABLE product;

Table dropped.

SQL>
SQL>
SQL>

 

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