Please give me an example of looping thru a detail set pipeline

rbuser

Happy Holidays to ALL!

I need a code example.

I have a master dataset and report to generate.

For each master record I need traverse and pull totals and other data
elements from a
1->M linked detail dataset. The Master is DBPipeline1 and the detail is
DBPipeline3.
I was looking at OnTraversal of Pipeline1 but was not sure if that was the
proper way to approach the problem.

I would appreciate any direction on this matter.

Thank you.

Bill Lawler
Elite Brokerage Services, Inc

digitalmetaphors

Hi Bill,

Please take a look at the ReportBuilder Developer's Guide as there are
tutorials on creating master detail reports to get you started. There is a
PDF located in your RBuilder installation directory. The key is to use
subreports to display the detail records connected to the detail dataset.

There are a couple of alternatives to master detail linking using queries:

------------------------------------------------------
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.


Cheers,

Jim Bennett
Digital Metaphors