Drill-down.. too many records displayed

rbuser

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

nardmoseley

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.


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