Using MODEL clause and COUNT for not numeric data columns....
Hi ,
Is it possible somehow to use the COUNT function to transform a non-numeric data column to a numeric data value (a counter) and be used in a MODEL clause....????
For example , i tried the following in the emp table of SCOTT dataschema with no desired result...
SQL> select deptno , empno , hiredate from emp;
DEPTNO EMPNO HIREDATE
20 7369 18/12/1980
30 7499 20/02/1981
30 7521 22/02/1981
20 7566 02/04/1981
30 7654 28/09/1981
30 7698 01/05/1981
10 7782 09/06/1981
20 7788 18/04/1987
10 7839 17/11/1981
30 7844 08/09/1981
20 7876 21/05/1987
30 7900 03/12/1981
20 7902 03/12/1981
10 7934 23/01/1982
14 rows selected Now , i want to use the MODEL clause in order to 'predict' the number of employees who were going to be hired in the 1990 per deptno...
So , i have constructed the following query which , as expected, does not return the desired results....
SQL> select deptno , month , year , count_
2 from
3 (
4 select deptno , to_number(to_char(hiredate,'mm')) month ,
5 to_number(to_char(hiredate , 'rrrr')) year , count(ename) count_
6 from emp
7 group by deptno , to_number(to_char(hiredate,'mm')) ,
8 to_number(to_char(hiredate , 'rrrr'))
9 )
10 model
11 partition by(deptno)
12 dimension by (month , year)
13 measures (count_ )
14 (
15 count_[1,1990]=count_[1,1982]+count_[11,1982]
16 )
17 /
DEPTNO MONTH YEAR COUNT_
30 5 1981 1
30 12 1981 1
30 2 1981 2
30 9 1981 2
30 1 1990
20 4 1987 1
20 5 1987 1
20 4 1981 1
20 12 1981 1
20 12 1980 1
20 1 1990
10 6 1981 1
10 11 1981 1
10 1 1982 1
10 1 1990 As you see , the measures for the 1990 year is null...because the measure(the count(deptno)) is computed via the group by and not by the MODEL clause...
How should i transform the above query... so as the "count_[1,1982]+count_[11,1982]" will return non-null results per deptno...????
Thanks , a lot
Simon
Connected to Oracle Database 10g Express Edition Release 10.2.0.1.0
Connected as hr
SQL>
SQL> SELECT department_id, MONTH, YEAR, count_
2 FROM (SELECT e.department_id
3 ,to_number(to_char(e.hire_date, 'mm')) MONTH
4 ,to_number(to_char(e.hire_date, 'rrrr')) YEAR
5 ,COUNT(e.first_name) count_
6 FROM employees e
7 WHERE e.department_id = 20
8 GROUP BY e.department_id
9 ,to_number(to_char(e.hire_date, 'mm'))
10 ,to_number(to_char(e.hire_date, 'rrrr')));
DEPARTMENT_ID MONTH YEAR COUNT_
20 8 1997 1
20 2 1996 1
SQL> --
SQL> SELECT department_id, MONTH, YEAR, count_
2 FROM (SELECT e.department_id
3 ,to_number(to_char(e.hire_date, 'mm')) MONTH
4 ,to_number(to_char(e.hire_date, 'rrrr')) YEAR
5 ,COUNT(e.first_name) count_
6 FROM employees e
7 WHERE e.department_id = 20
8 GROUP BY e.department_id
9 ,to_number(to_char(e.hire_date, 'mm'))
10 ,to_number(to_char(e.hire_date, 'rrrr')))
11 model
12 PARTITION BY(department_id)
13 dimension BY(MONTH, YEAR)
14 measures(count_)(
15 count_ [1, 1990] = count_ [2, 1996] + count_ [8, 1997]
16 );
DEPARTMENT_ID MONTH YEAR COUNT_
20 8 1997 1
20 2 1996 1
20 1 1990 2
SQL> ---
SQL> SELECT department_id, MONTH, YEAR, count_
2 FROM (SELECT e.department_id
3 ,to_number(to_char(e.hire_date, 'mm')) MONTH
4 ,to_number(to_char(e.hire_date, 'rrrr')) YEAR
5 ,COUNT(e.first_name) count_
6 FROM employees e
7 GROUP BY e.department_id
8 ,to_number(to_char(e.hire_date, 'mm'))
9 ,to_number(to_char(e.hire_date, 'rrrr')))
10 model ignore nav
11 PARTITION BY(department_id)
12 dimension BY(MONTH, YEAR)
13 measures(count_)(
14 count_ [1, 1990] = count_ [2, 1996] + count_ [8, 1997]
15 );
DEPARTMENT_ID MONTH YEAR COUNT_
100 8 1994 2
30 12 1997 1
100 3 1998 1
30 7 1997 1
5 1999 1
30 12 1994 1
30 11 1998 1
30 5 1995 1
100 9 1997 2
100 12 1999 1
30 8 1999 1
1 1990 0
30 1 1990 0
100 1 1990 0
90 9 1989 1
20 8 1997 1
70 6 1994 1
93 rows selected
SQL>
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