× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.



I'm new at SQL and would like for someone to please tell me if this
statement will do what I want.

The PRDHIST file has duplicate keys and is keyed on PHGRP, PHACCT, PHSSN,
PHPRID.

The COVMSTR is keyed on CVSSN CVGRP and CVACCT and it is a unique key.

PHPRID is a product ID and a person could have many products and many
different periods of coverage.

I want to join the PDTHIST with COVMSTR and pick up as many fields as I need
from the two files. I ordered it by the keys from PDTHIST plus the
termination date in descending order. (all records have termination dates
and only future dates are active records. I would like for the distinct
fields to be                 PHGRP
PHACCT
PHSSN
PHPRID but the SELECT statement seems to force you to list all fields that
you want to use. Can I restrict the DISTINCT fields to only certain fields
but still pick up other fields for use later in my program?. 

Is the WHERE statement used to join the files so you would always join the
two files with the keys and then add any additional
requirements/restrictions?

Any and all suggestion are greatly appreciated and please suggest a good
reference manual if you know of one. Thanks in advance. 
  
 EXEC SQL                                   
     DECLARE COBRA_CUR CURSOR FOR           
     SELECT DISTINCT                        
         A.PHGRP,                           
         A.PHACCT,                          
         A.PHSSN,                           
         A.PHEDCY,                          
         A.PHEDYR,                          
         A.PHEDMT,                          
         A.PHEDDY,                          
         A.PHTDCY,                          
         A.PHTDYR,                          
         A.PHTDMT,                          
         A.PHTDDY,                          
         A.PHPRID,                          
         A.PHTRFC,                          
         A.PHGGAO,                                           
         B.CVTRCD                                            
      FROM PDTHIST A, COVMSTR B                               
      WHERE (A.PHGRP = B.CVGRP)                               
      AND   (A.PHSSN = B.CVSSN)                               
      AND   (A.PHACCT = B.CVACCT)                             
      AND   (A.PHTRFC = :COBPO                                
      OR     A.PHTRFC = :COBPS                                
      OR     A.PHTRFC = :COBPC                                
      OR     A.PHTRFC = :COBPF                                
      OR     A.PHTRFC = :COBCO)                               
      AND   (DIGITS(A.PHTDCY)||DIGITS(A.PHTDYR)||             
            DIGITS(A.PHTDMT)||DIGITS(A.PHTDDY) > :TODAYS-DATE)
      ORDER BY A.PHGRP,                                       
               A.PHACCT,                                      
               A.PHSSN,
               A.PHPRID,                                       
               A.PHEDCY DESC,                                 
               A.PHEDYR DESC,     
               A.PHEDMT DESC,     
               A.PHEDDY DESC      
  END-EXEC.                       
 

                                         
+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---


As an Amazon Associate we earn from qualifying purchases.

This thread ...


Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.