problem to assotiate details in sub report with record from mastrer

rbuser

Hello,

I am wondering if you could help me out with the following difficulty.

I have to create a report using Delphi and Report Builder. The idea is
to display some financial information, record by record, with a column
one last column that displays details (such as some ID and amount) for
the records. For displaying the details, I am using sub-report.

I created this report in Report Builder. I used 2 queries ? 1 for
master(using 3 tables) and 1 for sub-report(using a fourth table) and I
linked these two queries by some fields. I grouped the information on a
design tab and everything was working perfectly.
Than I tried the same thing with a queries with a parameters passed from
Delphi form. Each query was passed through different DBPipelines. One
DBPipeline as master and another as a childe and by using
MasterFieldeLink Property in Object Inspector of the Delphi, I tried to
link them. After that in RB I assigned DBPipelineMaster to master report
and DBPipelineChilde to SubReport. However it doesn't work the same ways
in RB stand alone.
Do you have any suggestions?

Thanks,

Natalia Skournik

nardmoseley

Below is an article that explains two techniques for linking queries: Delphi
TQuery linking and RB DataPipeline linking.....


------------------------------------------------------
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





--
Nard Moseley
Digital Metaphors
http://www.digital-metaphors.com

rbuser

Hello, Nard.



Thank you for your prompt response.

The second technique was quite similar to my approach, except for
ordering by field. Your suggested ?Order By? helped me very much, and
the report is functional now!



Sincerely,

Natalia Skournik