Home Subreports
New Blog Posts: Merging Reports - Part 1 and Part 2

Drill-down.. too many records displayed

edited June 2006 in Subreports
I have a table debit table table that uses sub-reports to break on the
change in the description. In the footer, I show the TOTAL CHARGES and
COUNT for each description. That works great.

What I'm tying to do is add a DRILL-DOWN to allow a user to see WHICH debits
are included in that total. I used the technique as in demo 152 using a
'REGION', but when I click on the description to expand the detail, I get
all the items including those NOT in that group. I'm not sure how to
resolove this. Can anyone help me?

Jim

Comments

  • edited June 2006

    Connect the drill down subreport to a detail datapipeline that is linked to
    a master datapipeline.

    ------------------------------------------------------
    Tech Tip: Linking SQL Queries for Master/Detail Data
    ------------------------------------------------------

    The following example shows two options for linking SQL queries to create a
    master/detail relationship.

    In this example, we are using Delphi's DBDemos data to create a
    Customer/Order relationship. Thus we wish to link the Orders detail to the
    Customer master.

    I. Delphi Query Linking
    ------------------------

    a. Set the detail TQuery.DataSource property to point to the master
    query's TDataSource component.

    b. In the SQL "Where" clause for the detail query use a ':' followed by
    the linking field name from the master:

    example
    select *
    from orders
    where orders.CustNo = :CustNo

    Now each time the master record position changes, the detail query will
    automatically be refreshed with the correct result set.


    II. RB DataPipeline Linking
    -----------------------------

    a. Set the detail DataPipeline.MasterDataPipeline to point to the master
    DataPipeline.

    b. Use the detail DataPipeline.MasterFieldLinks property to define the
    linking relationship

    c. In the SQL for the detail, retrieve all records and sort them by the
    linking master field:

    select *
    from Orders
    order by CustNo


    Notes:

    1. Using RB DataPipeline, each query is executed only a single time - thus
    performance is much faster.

    2. RB Professional and Enterprise Editions include a visual Data environment
    for creating SQL queries, defining linking relationships, and creating
    Ask-At-Runtime parameters. Using the RB tools you could create the above
    linked queries in about 10 seconds.


    --
    Tech Support mailto:support@digital-metaphors.com
    Digital Metaphors http://www.digital-metaphors.com







    Best regards,

    Nard Moseley
    Digital Metaphors
    www.digital-metaphors.com
This discussion has been closed.