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

["Schutte, Michael D." <Michael_Schutte@xxxxxxxxxxxx>]

Then use the RAND() function to order by. Unless you absolutely need A B A B A B A B.  The rand() function would give you a mix, however, it could be  A B A A B A B B A B A A etc. 


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Shore
Sent: Monday, August 09, 2010 3:16 PM
To: Midrange Systems Technical Discussion
Cc: Midrange Systems Technical Discussion; midrange-l-bounces@xxxxxxxxxxxx
Subject: Re: Using SQL to "mix" the records in a file


Thanks for your reply Rob
In answer to your question of "Who cares?" the answer is ---Me You are correct, there are other columns in this file, but I only mentioned the columns that I need to deal with for this situation I'm trying to get a test file, where the 2 record types are mingled so that I can test another set of programs The mingle will be what is happening when we go live


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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So let's say your data contains only two columns:  RECID and TS.  And your sample data is:
A     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000

And you want:
A     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000
A     2010-08-09-08:01:35.00000
B     2010-08-09-08:01:35.00000

My question is:  Who cares?  What possible business reason is there?
Perhaps there must be some additional columns to consider?

But if there truly is some need then you could use that function that uses scratchpad to create a row_number and sort by the A/B column and that row_number.

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From:   Alan Shore <AlanShore@xxxxxxxx>
To:     Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date:   08/09/2010 02:32 PM
Subject:        Re: Using SQL to "mix" the records in a file
Sent by:        midrange-l-bounces@xxxxxxxxxxxx




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



             Alan Shore
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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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