Oracle Group By Rollup Example

Select time region department sum profit as profit from sales group by rollup time region dept as you can see in table 20 2 this query returns the following sets of rows.

Oracle group by rollup example. This is why we often use rollup to generate the subtotals and the grand total for reporting purposes. The rollup generates all grouping sets that make sense considering this hierarchy. Viewed 3k times 2. Script name group by rollup example.

Rollup cube grouping functions and grouping sets. Select customer id status sum quantity unit price sales from orders inner join order items using order id group by rollup customer id status. Ask question asked 3 years 6 months ago. You can however use the rollup function to enhance the grouping actions performed within your queries.

Active 3 years 6 months ago. Home articles misc here. Example 20 3 partial rollup. This oracle group by example uses the sum function to return the name of the product and the total sales for the product.

E oracle group by with rollup example the following statement computes the sales amount and groups them by customer id status and customer id status. That is at level expr1 expr2 expr3 expr1 expr2 and expr1. This example of rollup uses the data in the video store database. Select year month count sale id from sales group by rollup year month.

I m looking everywhere for an answer but nothing seems to compare with my problem. Lets take a look at a fairly complex group by example and then re write it using the group by rollup. Order by with group by rollup. Group by expr1 rollup expr2 expr3.

Description this example calculates multiple levels of subtotals across three dimensions and a grant total. Select channels channel desc calendar month desc countries country iso code to char sum amount sold. Select product sum sale as total sales from order details group by product. Select salesman id customer id sum quantity unit price amount from orders inner join order items using order id where status shipped and salesman id is not null and extract year from order date 2017 group by rollup salesman id customer id.

More oracle rollup examples the following example use rollup to return the sales values by salesman and customer. Let s look at an oracle group by query example that uses the sum function. Area sql general analytics. Referenced in database data warehousing guide.

In this case the group by clause creates subtotals at 2 1 3 aggregation levels. Year month total 2015 1 200 2015 2 415 2015. The rollup assumes a hierarchy among the input columns. So using rollup with query.

It would be safe to assume that most if not all of us are familiar with oracle group by clause. Created monday october 05 2015. This article gives an overview of the functionality available for aggregation in data warehouses focusing specifically on the information required for the oracle database sql expert 1z0 047 exam.