How to calculate the individual sums of multiple columns in a single query

Question

Hello,
Using Oracle 11gR2 on windows 7 client. I have a question on calculating sum() on multiple columns on different columns and store the results in a view. Unfortunately I could not post the problem here as it keeps on giving error "Sorry, this content is not allowed", without telling where or what it is! So I had to post it in the stack-overflow forum, here is the link: http://stackoverflow.com/questions/16529721/how-to-calculate-the-individual-sums-of-multiple-columns-in-a-single-query-ora
Will appreciate any help or suggestion.
Thanks

Answer 1

user13667036 wrote:
Hello,
Using Oracle 11gR2 on windows 7 client. I have a question on calculating sum() on multiple columns on different columns and store the results in a view. Unfortunately I could not post the problem here as it keeps on giving error "Sorry, this content is not allowed", without telling where or what it is! So I had to post it in the stack-overflow forum, here is the link: http://stackoverflow.com/questions/16529721/how-to-calculate-the-individual-sums-of-multiple-columns-in-a-single-query-ora
Will appreciate any help or suggestion.
ThanksLooks like you want a simple group by.
select
          yr
     ,      mnth
     ,      region
     ,     sum(handled_package)
     ,     sum(expected_missing_package)
     ,     sum(actual_missing_package)
from test
group by
     yr, mnth, region
order by      
     yr, mnth, region;I wouldn't recommend storing your data for year / month in 2 columns like that unless you have a really good reason. I would store it as a date column and add a check constraint to ensure that the date is always the first of the month, then format it out as you wish to the client.
CREATE TABLE test
     year_month                              date,
    Region                     VARCHAR2(50),
    CITY                       VARCHAR2(50),             
    Handled_Package            NUMBER,       
    Expected_Missing_Package   NUMBER,   
    Actual_Missing_Package     NUMBER
alter table test add constraint firs_of_month check (year_month = trunc(year_month, 'mm'));
ME_XE?Insert into TEST (year_month, REGION, CITY, HANDLED_PACKAGE, EXPECTED_MISSING_PACKAGE, ACTUAL_MISSING_PACKAGE)
  2  Values (to_date('2012-nov-12', 'yyyy-mon-dd'), 'Western', 'San Fransisco', 200, 10, 5);
Insert into TEST (year_month, REGION, CITY, HANDLED_PACKAGE, EXPECTED_MISSING_PACKAGE, ACTUAL_MISSING_PACKAGE)
ERROR at line 1:
ORA-02290: check constraint (TUBBY.FIRS_OF_MONTH) violated
Elapsed: 00:00:00.03
ME_XE?Insert into TEST (year_month, REGION, CITY, HANDLED_PACKAGE, EXPECTED_MISSING_PACKAGE, ACTUAL_MISSING_PACKAGE)
  2  Values (to_date('2012-nov-01', 'yyyy-mon-dd'), 'Western', 'San Fransisco', 200, 10, 5);
1 row created.
Elapsed: 00:00:00.01
ME_XE?select
  2        to_char(year_month, 'fmYYYY')    as year
  3     ,  to_char(year_month, 'fmMonth')   as month
  4     ,  Region
  5     ,  CITY
  6     ,  Handled_Package
  7     ,  Expected_Missing_Package
  8     ,  Actual_Missing_Package
  9  from test;
YEAR         MONTH                REGION                         CITY                    HANDLED_PACKAGE EXPECTED_MISSING_PACKAGE ACTUAL_MISSING_PACKAGE
2012         November             Western                        San Fransisco                       200                       10                      5
1 row selected.
Elapsed: 00:00:00.01
ME_XE?Then you have nice a nice and easy validation that ensures you data integrity.
Cheers,