Solved

Display monthly report

Posted on 2006-07-04
4
1,233 Views
Last Modified: 2008-03-17
I have a table Monthly_activity with column Act_date, activity_detail
Date format : dd/mon/yyyy

1/Jan/2006 Activity1
2/Jan/2006 Activity2
3/Jan/2006 Activity3
1/Feb/2006 Activity1
2/Feb/2006 Activity2
1/Mar/2006 Activity1
1/May/2006 Activity1
1/Jun/2006 Activity1
... so on until 1/Dec/2006

Hence that there is NO activity in APRIL.
I want to produce a list as below.

Month     Sum_activity

January        3
February      2
March          1
April            0
May             1
... ..
December     1

In the list, activity for April still displayed even there is no record in April.
So how can I do this using SQL. My database is Oracle.

0
Comment
Question by:KG1973
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 9

Assisted Solution

by:neo9414
neo9414 earned 100 total points
ID: 17040079

Try this...

select to_char(to_date(b.l,'mm'),'Month') Month, decode(a.present,null,b.cnt,a.cnt) Activities from (
select to_number(to_char(Act_date,'mm')) present,count(*) cnt from Monthly_activity
group by to_char(Act_date,'Month'),to_number(to_char(Act_date,'mm')))a,
(select level l, 0 cnt from dual connect by level <=12) b
where a.present(+) = b.l;

TEST
-----------

create table Monthly_activity(Act_date date, activity_detail varchar2(50));

insert into Monthly_activity values(to_date('01/jan/2006'),'Activity1');
insert into Monthly_activity values(to_date('02/jan/2006'),'Activity3');
insert into Monthly_activity values(to_date('03/jan/2006'),'Activity3');
insert into Monthly_activity values(to_date('01/feb/2006'),'Activity1');
insert into Monthly_activity values(to_date('03/feb/2006'),'Activity2');
insert into Monthly_activity values(to_date('01/mar/2006'),'Activity1');
insert into Monthly_activity values(to_date('01/may/2006'),'Activity1');
insert into Monthly_activity values(to_date('01/dec/2006'),'Activity1');

SQL>select to_char(to_date(b.l,'mm'),'Month') Month, decode(a.present,null,b.cnt,a.cnt) Activities from (
select to_number(to_char(Act_date,'mm')) present,count(*) cnt from Monthly_activity
group by to_char(Act_date,'Month'),to_number(to_char(Act_date,'mm')))a,
(select level l, 0 cnt from dual connect by level <=12) b
where a.present(+) = b.l;

MONTH     ACTIVITIES
--------- ----------
January            3
February           2
March              1
April              0
May                1
June               0
July               0
August             0
September          0
October            0
November           0

MONTH     ACTIVITIES
--------- ----------
December           1

12 rows selected.

cheers,
Neo
0
 
LVL 19

Accepted Solution

by:
actonwang earned 100 total points
ID: 17040085
assume your Act_date has datetype of DATE, you can use the following query:

select a.month "Month", nvl(a.sum_activity+b.sum_activity,0) "Sum_activity"
from
(
select to_char(add_months(trunc(sysdate,'YEAR'),rn-1),'Month') month,0 sum_activity
from (select rownum rn from dual connect by level <= 12)
) a left join
(
select to_char(Act_date,'Month') month, count(activity_detail) sum_activity
from Monthly_activity
group by to_char(Act_date,'Month')
) b on  a.month = b.month
order by to_date(a.month,'Month')
/
0
 
LVL 1

Author Comment

by:KG1973
ID: 17040592
I increase the value points to 200 so that I can give to all contributors.
0
 
LVL 1

Author Comment

by:KG1973
ID: 17040599
Hi neo9414 & actonwang.

Both of you gave me the right answer, but I prefer actonwang solution because it is easy for me to understand.
However neo9414 make us easy to test both scripts and his solution also right.

I am really appreciate your contributions.
Thanks guys.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Creation date for a PDB 5 62
join a table with user_tab_columns in oracle 3 66
pl/sql parameter is null sometimes 2 23
MS SQL Server Management Studio R2 4 25
Working with Network Access Control Lists in Oracle 11g (part 1) Part 2: http://www.e-e.com/A_9074.html So, you upgraded to a shiny new 11g database and all of a sudden every program that used UTL_MAIL, UTL_SMTP, UTL_TCP, UTL_HTTP or any oth…
Truncate is a DDL Command where as Delete is a DML Command. Both will delete data from table, but what is the difference between these below statements truncate table <table_name> ?? delete from <table_name> ?? The first command cannot be …
Via a live example show how to connect to RMAN, make basic configuration settings changes and then take a backup of a demo database
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question