Re: SQL Question ... how to SETGT, READPE in SQL

Ed:

Lets say the table (database) contains these fields

id
time_stamp
data_field_1
data_field_2
data_field_3

I could not make the example get the last record, that is data_field_1, data_field_2, data_field_3 for the most recent record for each id.

Any thoughts?






eegbert@xxxxxxxxxxxxxxxxxx
07/26/2007 04:09 PM
Please respond to Java Programming on and around the iSeries / AS400
To: Java Programming on and around the iSeries / AS400 <java400-l@xxxxxxxxxxxx>
cc: (bcc: Bill Blalock/TUS/US/Certegy)
Subject: Re: SQL Question ... how to SETGT, READPE in SQL


You could try: SELECT id, MAX(time_stamp) FROM table_name GROUP BY id This electronic message transmission contains information from Black Hills
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bill.blalock@xxxxxxxxxxx Sent by: java400-l-bounces@xxxxxxxxxxxx 07/26/2007 03:03 PM Please respond to Java Programming on and around the iSeries / AS400 <java400-l@xxxxxxxxxxxx>
To java400-l@xxxxxxxxxxxx cc Subject SQL Question ... how to SETGT, READPE in SQL




Is there a simple way to select the last record in a series? Say the most
recent record of a set using a timestamp. For example, a data base record with id time_stamp data fields In RPG one could create a logical file, or OPNQRYF with keys id time_stamp To get the last record for each id one could set id to *LOVAL repeat until end of file SETGT READPE Can you do this with SQL (hence with Java) ... or should you drop back to relative record access with JT400? Thanks all ------------------------------------------------------------------------------
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