Analytical function Isse

Question

I have been using sliding window partition functions to calculate year-to-date summations on monthly data. For example, SUM(CALLS) OVER (PARTITION BY REP, PRODUCT ORDER BY MONTH_DATE ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW), would give me a running total for each month, as long as I only use one year and start in January! I need to be able to perform aggregates like this on time periods like year to date, quarter to date, and others like current month last year or previous year to date. Can I use partition functions or do I need to use embedding functions or embedding SQL queries within the main SQL query? HELP!

Answer 1

do you mean partition by year?
HTH
Laurent Schneider
OCM DBA
select ename, hiredate, sal, extract(year from hiredate) year,
    sum(sal) over (
        partition by trunc(hiredate,'YYYY')
        order by hiredate
        rows BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) tot_sal
from emp;
ENAME      HIREDATE         SAL       YEAR    TOT_SAL
SMITH      17-DEC-80        800       1980        800
ALLEN      20-FEB-81       1600       1981       1600
WARD       22-FEB-81       1250       1981       2850
JONES      02-APR-81       2975       1981       5825
BLAKE      01-MAY-81       2850       1981       8675
CLARK      09-JUN-81       2450       1981      11125
TURNER     08-SEP-81       1500       1981      12625
MARTIN     28-SEP-81       1250       1981      13875
KING       17-NOV-81       5000       1981      18875
JAMES      03-DEC-81        950       1981      19825
FORD       03-DEC-81       3000       1981      22825
MILLER     23-JAN-82       1300       1982       1300
SCOTT      19-APR-87       3000       1987       3000
ADAMS      23-MAY-87       1100       1987       4100