Problems with generating Audit SQL

countoracleoracle-10g

Im currently working on a project that uses Oracle 10g where every action from the user is recorded in a auditlog table. The current table holds the following values:

AuditID
AuditDate
Username
Page Name
Type (Insert, Delete, Update, Login etc...)

Whenever a user does one of the above Types an audit log is saved.

What I would like to do is to get a count of each page for a particular time scale. For example Day, Month, Year and Quarter.

I have came up with some SQL to get the results for all of the pages together but i am having some trouble with getting the values for each individual page. Below i have given one of the SQL queries that i am using (Year).

SELECT (SELECT Count(*) from AUDITLOG WHERE to_char(auditdate, 'yy') = to_char(to_date(sysdate)-1100, 'yy')) As Y_2009,
(SELECT Count(*) from AUDITLOG WHERE to_char(auditdate, 'yy') = to_char(to_date(sysdate)-732, 'yy')) As Y_2010,
(SELECT Count(*) from AUDITLOG WHERE to_char(auditdate, 'yy') = to_char(to_date(sysdate)-368, 'yy')) As Y_2011,
(SELECT Count(*) from AUDITLOG WHERE to_char(auditdate, 'yy') = to_char(to_date(sysdate), 'yy')) As Y_2012,
(SELECT Count(*) from AUDITLOG WHERE to_char(auditdate, 'yy') = to_char(to_date(sysdate)+368, 'yy')) As Y_2013
From Dual;

This SQL would give me the results of every single page for each year. However I need to find out the results for each page for each year. Is there anyway of doing this without creating an SQL statement like the one above for each page?

If you would like more information please ask.

Edit

The results i need would need to be in the following format:

PageTitle|   Oct_1    Oct_2     Oct_3    Oct_4    Etc...
----------------------------------------------------------
Page1    |   12       23        28       43        .....
Page2    |   23       64        21       18        .....

Best Answer

Looks like you need a GROUP BY. Your query above done with a GROUP BY would look like this:

SELECT to_char(auditdate,'YYYY'), count(*) 
FROM AuditLog GROUP BY to_char(auditdate,'YYYY');

A similar query can be used for other groupings. For example, here would be a count for each day:

SELECT to_char(auditdate,'MM/DD/YYYY'), count(*) 
FROM AuditLog GROUP BY to_char(auditdate,'MM/DD/YYYY');

To do this for each PageTitle, simply add PageTitle like this:

SELECT PageTitle , to_char(auditdate,'MM/DD/YYYY'), count(*) 
FROM AuditLog GROUP BY PageTitle, to_char(auditdate,'MM/DD/YYYY');

To pivot the data as you have shown gets a bit more difficult particularly on 10g where there is no PIVOT. Here is one way to do it on 10g:

SELECT PageTitle 
   , Sum(DECODE(to_char(AuditDate,'MM/DD/YYYY'),'10/22/2012',1,NULL)) Oct_22
   , Sum(DECODE(to_char(AuditDate,'MM/DD/YYYY'),'10/23/2012',1,NULL)) Oct_23
FROM AuditLog GROUP BY PageTitle;

Of course this requires entering all the dates. You can make this a bit easier by generating the query using a query such as this:

SELECT 'SELECT PageTitle ' SQL FROM dual
UNION ALL
SELECT DISTINCT '    , Sum(DECODE(to_char(AuditDate,''MM/DD/YYYY''),'''
   || to_char(AuditDate,'MM/DD/YYYY') || ''',1,NULL)) ' || to_char(AuditDate,'Mon_DD')
FROM AuditLog
UNION ALL
SELECT 'FROM AuditLog GROUP BY PageTitle;' FROM dual;

Here is the sample data I used:

drop table auditlog;
create table AuditLog as (select sysdate auditdate, 'Page 1' PageTitle from dual);
insert into auditlog (select sysdate, 'Page 1' from dual);
insert into auditlog (select sysdate, 'Page 2' from dual);
insert into auditlog (select sysdate, 'Page 3' from dual);
insert into auditlog (select sysdate, 'Page 3' from dual);
insert into auditlog (select sysdate, 'Page 3' from dual);
insert into auditlog (select sysdate+1, 'Page 1' from dual);
insert into auditlog (select sysdate+1, 'Page 1' from dual);
insert into auditlog (select sysdate+1, 'Page 2' from dual);
insert into auditlog (select sysdate+1, 'Page 2' from dual);
insert into auditlog (select sysdate+1, 'Page 3' from dual);
commit;
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