RE: Using SQL to "mix" the records in a file

[Tom E Stieger <testieger@xxxxxxxxxxxx>]

Use row number by timestamp and breaking on record type.  Then you can order by row number and recid.

WITH numbering AS (
	SELECT timestamp, recid, 
	ROW_NUMBER() OVER (PARTITION BY recid ORDER BY timestamp) AS number
FROM your_file )

SELECT number, recid, timestamp FROM numbering

ORDER BY number, recid

-Tom Stieger 

PS. There is more info on this and other functions at http://www-03.ibm.com/systems/resources/systems_i_software_db2_pdf_rcte_olap.pdf.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Shore
Sent: Monday, August 09, 2010 11:30 AM
To: midrange-l@xxxxxxxxxxxx
Subject: Re: Using SQL to "mix" the records in a file


As soon as I pressed Enter, I wasn't too sure that I had explained myself So here is my second attempt The file contains 1,000 records, by timestamp, but as it happens, the first 500 are record types A and the second 500 are record types B (by timestamp)

I need to change the timestamp so that the 2 types are mingled A B A B A B

by timestamp

Hopefully that makes it a little clearer

Again, thanks in advance



Alan Shore
Programmer/Analyst, Direct Response
E:AShore@xxxxxxxx
P:(631) 200-5019
C:(631) 880-8640
"If you're going through Hell, keep going" - Winston Churchill


                                                                       
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Morning all
sorry about the subject line, but I couldn't think of a better one Here is my predicament

I have a test file with thousands of records, but basically 2 types Record type A Record type B

The key to this file is a timestamp field, however, the file is basically one batch of record type A, followed by a batch of record type B (based on
timestamp)
How can I "mix/mingle" these types so that the sequence (by timestamp) is A B A B A

it can be a group of A, a group of B, a group of A, a group of B As long as there is a mixture I've thought about this all morning to no avail, so if someone has any ideas , it would be MUCH appreciated

Thanks in advance


Alan Shore
Programmer/Analyst, Direct Response
E:AShore@xxxxxxxx
P:(631) 200-5019
C:(631) 880-8640
"If you're going through Hell, keep going" - Winston Churchill
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