ntile and row_number : NTILE « Analytical Functions « Oracle PL / SQL

1. Oracle PL / SQL
2. Analytical Functions
3. NTILE

ntile and row_number

 

SQL> CREATE TABLE sales(
  2    product_id            NUMBER(6),
  3    cid           NUMBER,
  4    time_id               DATE,
  5    sold         NUMBER(3),
  6    amount                NUMBER(10,2),
  7    cost                  NUMBER(10,2)
  8  );

Table created.

SQL>
SQL> CREATE TABLE products(
  2    product_id           NUMBER(6),
  3    name         VARCHAR2(50),
  4    subcategory     VARCHAR2(50),
  5    category        VARCHAR2(50),
  6    min_price       NUMBER(8,2)
  7  );

Table created.

SQL>
SQL>
SQL>
SQL> select b.subcategory, sum(a.sold),ntile(4) over (ORDER BY SUM(a.sold) desc) as quartile,
  2         row_number () over (order by sum(sold) desc) as rownumber
  3  from sales a, products b
  4  where a.product_id = b.product_id
  5  and to_char(a.time_id, 'yyyy-mm') = '2001-06'
  6  group by b.subcategory;

no rows selected

SQL>
SQL>
SQL>
SQL> drop table sales;

Table dropped.

SQL>
SQL> drop table products;

Table dropped.

SQL>

   
  

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