JDeveloper does not support the SQL expert, cannot add query clause to view link

For developers who can know:

I use JDeveloper 10.1.3.4 and I have two tables, we're STUDENTS, the other is the PRICE, with a one-to-many relationship (a student may have several awards), and ID is the foreign key:
STUDENTS
------------------------
ID    NAME    DOB
------------------------
9999  JOHN    01/02/1990
   |  
   |  
   |  
   |           AWARDS
   |           ------------------------
   |           ID      DESC      AMOUNT
   |           ------------------------
   ----------- 9999    PELL      500
               9999    PERKINS   800
               9999    LOAN      900
In the application, when a student (9999, JOHN) connects, the information above is displayed. I need to add up all the awards for the student and to display not only the elements of price, but also the total amount of all awards. To do this, I created another object to view named TotalAwards in the object entity the price just to get the total amount. The SQL code of the VO's
SELECT SUM(Awards.AMOUNT) AS TOTAL
FROM AWARDS Awards
Then, a link is created between the students and the TotalAwards, and use of the new link to the view is added to the application module. TotalAwards is now available in the data control palette to be drag-and - drop to pages.

Problem occurs when the application is invoked. An error is caught before the application can begin. The error message indicates that "the ends or the link view do not specify an attribute.

It seems that the TOTAL 'SUM (Awards.AMOUNT) AS TOTAL' is not recognized as an attribute. I have reviewed the query clause in the display link to see if it is there, such as:
         Attribute        Bind Variable
         ------------     --------------
         Students.ID      :Bind_Id


WHEHE    :Bind_Id = Awards.ID
There is no such clause in the query clause page. And I can not add a no more, because the page is grayed out and disabled. I think maybe it's for the same reason: TOTAL is not recognized as an attribute of the price.

How to get around the problem? Or are there other ways to summarize the total amount and view it in the browser?

Thank you very much for help!


Newman

Hello

Here you have a solution for the TOTAL:
http://www.freewebalbum.com/blogs/faces/bjanko/blogs.jsp?blog=bjanko20070725180020

Kind regards

Branislav

Tags: Java

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