Query Question
- From: "Hostetter, Jay M" <JHostetter@xxxxxxxxxxxxxxxxxxxx>
- To: <Oracle-L@xxxxxxxxxxxxx>
- Date: Thu, 10 Aug 2006 16:08:01 -0400
I know there has to be a simple way to do this, but my brain can't put
it togther this afternoon. I have a parent table (accounts) and a child
table (details). I am creating a view that ties the two tables
together. I would like a column in this view that shows a summary of a
column in the parent table - but I want this summary to be for each
distinct parent record - not the child records.
Here is my view:
create view test_view
(customer_name,
amount,
detail_item)
as
(select customer_name,
sum(amount),
detail_item
from accounts a,
details d
where a.account_no=d.account_no
group by customer_name;
Sample records from Accounts (Customer_name, Account_no, Amount):
Fred, 12345, 10
Fred, 45678, 15
Sample records from Details (Account_No, Detail_item, Description):
12345, Telephone, yaddayadda
12345, Call Forwarding, yaddayadda
45678, Cell Phone, yaddayadda
I would like my view to return (note the 25, which is a sum of the two
disting Amount values from Accounts):
Fred, 25, Telephone
Fred, 25, Call Forwarding
Fred, 25, Cell Phone
Instead, I am getting (note the 35, which is the sum of the amount
field, when joined with details, because the value 10 is duplicated due
to 2 child records for acocount 12345):
Fred, 35, Telephone
Fred, 35, Call Forwarding
Fred, 35, Cell Phone
In my view, the sum(amount) is summing for each row in the view. I want
it to sum for each distinct account number. I know that I can use
sum(distinct amount), but there is no guarantee that the amounts will
always be unique - the PK is the account number.
Thank you,
Jay
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