How to produce group subtotals for all combinations of the dimensions specified in Oracle?

Problem Statement:
You want to find out subtotals for all combinations of the dimensions specified in Oracle.

Solution:
The CUBE function will generate subtotals for all combinations of the dimensions specified. If “n” is the number of columns listed in the CUBE, there will be 2n subtotal combinations.

We will begin by create the necessary data for this requirement.

Example

-- Drop table
DROP TABLE atp_titles;

-- Create table
CREATE TABLE atp_titles (
  player             VARCHAR2(100) NOT NULL,
  title_type         VARCHAR2(100) NOT NULL,
  titles             NUMBER NOT NULL);

Example

-- insert  ATP tour titles won by the player
INSERT INTO atp_titles VALUES('Roger Federer','ATP Tour Titles',103);
INSERT INTO atp_titles VALUES('Rafael Nadal','ATP Tour Titles',86);
INSERT INTO atp_titles VALUES('Novak Djokovic','ATP Tour Titles',81);
INSERT INTO atp_titles VALUES('Pete Sampras','ATP Tour Titles',64);
INSERT INTO atp_titles VALUES('Andre Agassi','ATP Tour Titles',52);
INSERT INTO atp_titles VALUES('Andy Murray','ATP Tour Titles',46);
INSERT INTO atp_titles VALUES('Thomas Muster','ATP Tour Titles',39);
INSERT INTO atp_titles VALUES('Andy Roddick','ATP Tour Titles',32);

Example

-- insert  grandslam titles won by the player
INSERT INTO atp_titles VALUES('Roger Federer','Grandslams',20);
INSERT INTO atp_titles VALUES('Rafael Nadal','Grandslams',20);
INSERT INTO atp_titles VALUES('Novak Djokovic','Grandslams',17);
INSERT INTO atp_titles VALUES('Pete Sampras','Grandslams',14);
INSERT INTO atp_titles VALUES('Andre Agassi','Grandslams',8);
INSERT INTO atp_titles VALUES('Andy Murray','Grandslams',3);
INSERT INTO atp_titles VALUES('Thomas Muster','Grandslams',1);
INSERT INTO atp_titles VALUES('Andy Roddick','Grandslams',0);

COMMIT;

Now we will look at few records inserted into atp_titles table.

Example

SELECT * FROM atp_titles ORDER BY 1;

Output

Andre Agassi    ATP Tour Titles     52
Andre Agassi    Grandslams          8
Andy Murray Grandslams          3
Andy Murray ATP Tour Titles     46
Andy Roddick    ATP Tour Titles     32
Andy Roddick    Grandslams          0
............................
............................

Let us apply now CUBE function to the atp player - “Roger Federer”

SQL:

Example

SELECT player,title_type, SUM(titles) AS total_titles
  FROM atp_titles
 WHERE player = 'Roger Federer'
GROUP BY CUBE (player,title_type)
ORDER BY player,title_type  ;

Output

In addition to the subtotals generated by the ROLLUP extension, the CUBE extension had generated subtotals for all combinations of the player and title type specified.The output from the CUBE is highlighted in bold above.

Now we will apply the CUBE function for all the players in the table as below:

Example

SELECT player,title_type, SUM(titles) AS total_titles
  FROM atp_titles
GROUP BY CUBE (player,title_type)
ORDER BY player,title_type