Select Query for Report

Question

Hi All
I have a table called Agent. Each Agent processes requests.
So accordingly Request is another table.
Now the Agent can process the request successfully, fail or it could be
in progress.
So accordingly I have a status column in the Request table which can have the following values
New - when the request is allocated to the agent
Open- When the agent opens the request
Action- when the agent acted upon the request
Sold - when the agent was successful in processing the request
Fail - when the agent could not process the request
In the Request table there is column called requestDate which is the
date when the Request was first inserted (i.e when its New)
Now whenever the agent acts upon the request from the front end
the status change is logged in a RequestLog table.
So when the agent changes the status to Open, an entry is logged into
RequestLog table.
So when the agent open the request an entry in the RequestLog table
would go with the status as open , the reference of the requestId &
the date on which the status is changed
Similar entries will be logged for each request when the agent acts on
the respective requests like if its Sold then the status will be sold,
the date of sale & the corresponding request Id will be logged into the
RequestLog table.
In the Request table the status will be changed to "Open" or "Sold" but the
requestDate will not change & it will remain the date when it was inserted
Now I want to generate a Report which shows the list of all agents within a state
with all total number of requests they have handled, how many are in Opened status,
how many are in Sold status & how many are in Fail status. I also have to show the
average time(in days) it took for each agent to Open the request, make the sale or qualify it
as Fail. This average time I want it for an agent & not request specific.
& In the end I have to show the grand total of all the requests handled by all the agents,
grand total of opened status requests,grand total of Sold status requests,grand total of Fail status requests as well as the total average time it took to Open ,total average time it took to sale & total average time it takes to Fail
I have dabbled with simple SQL but not a complex report type like above. So I would need help from all you experts.
Here is what I plan to do
my from clause would include the Agent, Request, RequestLog table
where Request.requestdate between <fromDate> and <toDate>
group by agent.agentname,
Select would have count(agent.requestid),
Now how do i show the list of Open requests, sold requests & fail requests in different columns since all these values are in the same column.
Also I am aware of the average fnction but I need help on how to use the same in such a scenario.
Do post your thoughts on the same.
Regards

Answer 1

Hi All
I have made some queries to fetch the Report data. I would want you to post your comments on the same.
This is my first query which returns the total count of request per dealer, how much are in open, sent & dead state & total per status.
select AGENT.COMPANY_NAME,count(REQUEST.REQUEST_ID) TOTAL ,
sum(decode(REQUEST.status,'Open',1,0)) OPEN,
sum(decode(REQUEST.status,'Sent',1,0)) SENT,
sum(decode(REQUEST.status,'Dead',1,0)) DEAD
from AGENT, REQUEST
where
AGENT.STATE='ACT'
and REQUEST.REQUEST_TYPE='B'
and REQUEST.CONFIRMATION='Y'
and AGENT.DEALER_ID = REQUEST.DEALER_NUMBER
group by grouping sets(AGENT.COMPANY_NAME, ())
Then I have to retrieve the average number of days it takes to change the request to Open, average number of days it takes to change the request to Sent & average number of days it takes to change the request to Dead
per Agent. The base date is stored in REQUEST table (request_date column) & the subsequent change of status is stored in activity_date column
of ACTIVITY table
Here is what I do get the average number of days it takes to change the status for the Agent
select AGENT.COMPANY_NAME,
avg( decode (REQUEST.status,'Open',ACTIVITY.ACTIVITY_DATE - REQUEST.REQUEST_DATE,0)) AVG_OPEN,
avg( decode (REQUEST.status,'Sent',ACTIVITY.ACTIVITY_DATE - REQUEST.REQUEST_DATE,0)) AVG_SENT,
avg( decode (REQUEST.status,'Dead',ACTIVITY.ACTIVITY_DATE - REQUEST.REQUEST_DATE,0)) AVG_DEAD
from REQUEST, ACTIVITY, AGENT
where
AGENT.STATE='ACT'
and REQUEST.REQUEST_TYPE='B'
and REQUEST.CONFIRMATION='Y '
and REQUEST.dealer_number = AGENT.DEALER_ID
and REQUEST.STATUS = ACTIVITY.STATUS
group by grouping sets(AGENT.COMPANY_NAME, ())
I hope this is the right way for calculating average number of days
Since most part of the queries is the same
I tried to merge both the queries into one because I need to render the report in that fashion. But the moment I merge the query its giving absurd results.
Do post your thoughts on the same
Regards