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Focal Point    Focal Point Forums  Hop To Forum Categories  WebFOCUS/FOCUS Forum on Focal Point     [Solved] getting max effective date in a cluster join of master

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[Solved] getting max effective date in a cluster join of master
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Cindy Cook
Member
posted
I have one Table, having identical customer ID's each having multiple Effective dates for that customer. I want to create a definition in the MDF that only brings back the highest effective date for the customer. In a report join I know how to do it, but there must be a way in the file definition to do this. I'd appreciate any help you can give me.

Thank you

This message has been edited. Last edited by: Cindy Cook,


WebFOCUS 8007 Windows, All Outputs
 
Posts: 2 | Registered: November 24, 2013Report This Post
Danny-SRL
Virtuoso
posted Hide Post
Cindy,
What you are saying is that you want to create a field returning the MAX.DATE.
You could use a COMPUTE satement in the MFD:
COMPUTE MDATE/DMYY=MAX.DATE;

But then remember to use SUM and if you also need details, a multi-set request (or in DS, sort groups).


Daniel
In Focus since 1982
wf 8.202M/Win10/IIS/SSA - WrapApp Front End for WF

 
Posts: 1980 | Location: Tel Aviv, Israel | Registered: March 23, 2006Report This Post
Cindy Cook
Member
posted Hide Post
HI Danny,
I must be doing something wrong in the MDF because I am still getting the duplicated rows.

My table has Cust# 1 with several rows with different effective dates.

I want to have the customer# and only the max eff date for that customer come back when someone chooses the master file for a report.
Maybe that is not something that can be done in a master file definition.

Normally in my sql I would do a sub select query:

select a.customerNbr, a.eff_dt
from Customer a
where a.eff_dt =
(select max(b.eff_dt) from
Customer b
where b.customerNbr = a.customerNbr)

Is that doable?
Thank you


WebFOCUS 8007 Windows, All Outputs
 
Posts: 2 | Registered: November 24, 2013Report This Post
Francis Mariani
Expert
posted Hide Post
SQL sub-queries were introduced in v7.7.05. I haven't tried it yet, but it sounds intriguing.

The basic idea is to create a permanent SQL sub-query using HOLD FORMAT SQL_SCRIPT and store the resulting master and access files in the same application folder where your other metadata files are located. Then you call the sub-query in your main TABLE FILE using the DB_INFILE function. This is all described in the WebFOCUS New Features document, Version 7 Release 7.05:

- Reporting Language Enhancements > Creating a Subquery...
- Reporting Language Enhancements > DB_INFILE...


Francis


Give me code, or give me retirement. In FOCUS since 1991

Production: WF 7.7.05M, Dev Studio, BID, MRE, WebSphere, DB2 / Test: WF 8.1.05M, App Studio, BI Portal, Report Caster, jQuery, HighCharts, Apache Tomcat, MS SQL Server
 
Posts: 10577 | Location: Toronto, Ontario, Canada | Registered: April 27, 2005Report This Post
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