RE: SQL to transform Rows to Columns

Fyi,
The genius that came up with that sql statement is Birgitta. See link
below for what that sql statement is about.

http://archive.midrange.com/rpg400-l/200501/msg00426.html

-----Original Message-----
From: Lim Hock-Chai
Sent: Monday, August 11, 2008 8:58 AM
To: 'midrange-l@xxxxxxxxxxxx'
Subject: Re: SQL to transform Rows to Columns

Pete,
I ask this similar question in RPG group and somebody (Not sure who, I'm
going to lookup his name when I got a chance) came up with this sql
statement:


Please note that you will have to do 8 with statements, instead of 3. I
don't have time to re-do it using your file and fields. Basically, my
file name is rmvFect1, which contains a phone number and a feature
fields. The result of this sql make a phone number with multi
records/features (up to 3) into one record with 3 features.



with first as (select phone as phone1,
Min(feature) as Min1 from rmvfect1 group by phone),
second as (select phone as phone2,
Min(feature) as Min2 from rmvfect1 join first
on phone1 = phone and min1 < feature
group by phone),
Third as (select phone as phone3,
Min(feature) as Min3 from rmvfect1 join second
on phone2 = phone and min2 < feature
group by phone)
select phone1, min1, min2, min3
from first left outer join second on phone1 = phone2
left outer join third on phone1 = phone3


"Pete Helgren" <Pete@xxxxxxxxxx> wrote in message
news:<mailman.2780.1218317201.2545.midrange-l@xxxxxxxxxxxx>...

After perusing the web for an hour or so looking for a technique to
handle this, I haven't found a solution so perhaps some of the SQL

gurus

can lend a hand.

I have an application that has a select statement that basically

selects

9 columns of data from a single row in a table. Like this:

SELECT ASJD#, ASJAB1, ASJAB2, ASJAB3, ASJAB4, ASJAB5, ASJAB6, ASJAB7,
ASJAB8 FROM MyFile

I also have two other databases that have similar data but the table
structure is different. Rather than have a single record with 8

columns

of data (ASJAB1-8) it can have a recurring sequence of up to 8 rows of

data. The database can vary by customer. I can't control what

database

they use. For simplicity sake, let's say they have two fields:

ID, ASJAB

This could repeat up to 8 times. So with data in the record (again,
simplified) one record in one of the databases could be like this:

1234, 'stuff here', 'more stuff here', 'any stuff here', 'my stuff
here', 'other stuff here', 'could be stuff here', 'no stuff here',

'end

of stuff here'

but the other table in the other database might have data like this:

1234, 'stuff here'
1234, 'more stuff here'
1234, 'any stuff here'
1234, 'my stuff here'
1234, 'other stuff here'
1234, 'could be stuff here'
1234, 'no stuff here'
1234, 'end of stuff here'

My goal is not not write database specific code.

Just to add an additional wrinkle. The rows *may* recur up to 8 times

but can vary from 0 to 8 occurrences. The fixed record *always* has
eight columns but the two column table with multiple occurrences in

the

rows can vary from 0 to 8. So, I almost think that I need a loop to
loop through the results and "build" a record from that but I am out

of

gas on my SQL skills at that point.

I *want* to handle this without changing the SQL statement in the
application. I would just like a view or procedure that returns a
record that "looks" the same to the application. The reason is that

it

simplifies the SQL processing so I don't have to change all the SQL
statements in my application with a conditional statement that says if

the table is "X" then do this. If it is "Y", then do this. If it is
"Z" do it this way. A view or stored procedure that returned a similar

record keeps it simple but may be impossible?

I am on V5R3M0. I am still poking around the web but I can't seem to
find anything similar.

Thanks,

Pete