Mega Code Archive
GROUPING() Comes to the Rescue
You use the GROUPING() function with an expression that might contain NULLs.
GROUPING() function returning value is only relevant when the value is NULL.
GROUPING() function returns 1 when the NULL represents a super aggregate.
GROUPING() function returns 0 when the NULL represents a group of NULLs in the base table.
CUBE Query and the GROUPING() function
10>
11> CREATE TABLE employee(
12> id INTEGER NOT NULL PRIMARY KEY,
13> first_name VARCHAR(10),
14> last_name VARCHAR(10),
15> salary DECIMAL(10,2),
16> start_Date DATETIME,
17> region VARCHAR(10),
18> city VARCHAR(20),
19> managerid INTEGER
20> );
21> GO
1> INSERT INTO employee VALUES (1, 'Jason' , 'Martin', 5890,'2005-03-22','North','Vancouver',3);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (2, 'Alison', 'Mathews',4789,'2003-07-21','South','Utown',4);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (3, 'James' , 'Smith', 6678,'2001-12-01','North','Paris',5);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (4, 'Celia' , 'Rice', 5567,'2006-03-03','South','London',6);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (5, 'Robert', 'Black', 4467,'2004-07-02','East','Newton',7);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (6, 'Linda' , 'Green' , 6456,'2002-05-19','East','Calgary',8);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (7, 'David' , 'Larry', 5345,'2008-03-18','West','New York',9);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (8, 'James' , 'Cat', 4234,'2007-07-17','West','Regina',9);
2> GO
(1 rows affected)
1> INSERT INTO employee VALUES (9, 'Joan' , 'Act', 6123,'2001-04-16','North','Toronto',10);
2> GO
(1 rows affected)
1>
2> select * from employee;
3> GO
id first_name last_name salary start_Date region city managerid
----------- ---------- ---------- ------------ ----------------------- ---------- -------------------- -----------
1 Jason Martin 5890.00 2005-03-22 00:00:00.000 North Vancouver 3
2 Alison Mathews 4789.00 2003-07-21 00:00:00.000 South Utown 4
3 James Smith 6678.00 2001-12-01 00:00:00.000 North Paris 5
4 Celia Rice 5567.00 2006-03-03 00:00:00.000 South London 6
5 Robert Black 4467.00 2004-07-02 00:00:00.000 East Newton 7
6 Linda Green 6456.00 2002-05-19 00:00:00.000 East Calgary 8
7 David Larry 5345.00 2008-03-18 00:00:00.000 West New York 9
8 James Cat 4234.00 2007-07-17 00:00:00.000 West Regina 9
9 Joan Act 6123.00 2001-04-16 00:00:00.000 North Toronto 10
(9 rows affected)
1>
2>
3>
4> SELECT
5> ID,
6> GROUPING(ID) AS Grp_Cust,
7> YEAR(Start_Date) AS Order_Year,
8> GROUPING(YEAR(Start_Date)) AS Grp_Year,
9> COUNT(*) as Order_Count
10> FROM
11> Employee
12> GROUP BY
13> ID,
14> YEAR(Start_Date)
15> WITH CUBE
16> GO
ID Grp_Cust Order_Year Grp_Year Order_Count
----------- -------- ----------- -------- -----------
1 0 2005 0 1
1 0 NULL 1 1
2 0 2003 0 1
2 0 NULL 1 1
3 0 2001 0 1
3 0 NULL 1 1
4 0 2006 0 1
4 0 NULL 1 1
5 0 2004 0 1
5 0 NULL 1 1
6 0 2002 0 1
6 0 NULL 1 1
7 0 2008 0 1
7 0 NULL 1 1
8 0 2007 0 1
8 0 NULL 1 1
9 0 2001 0 1
9 0 NULL 1 1
NULL 1 NULL 1 9
NULL 1 2001 0 2
NULL 1 2002 0 1
NULL 1 2003 0 1
NULL 1 2004 0 1
NULL 1 2005 0 1
NULL 1 2006 0 1
NULL 1 2007 0 1
NULL 1 2008 0 1
(27 rows affected)
1>
2> drop table employee;
3> GO