Re: Referencing columns in temporary tables using SQL -- MIDRANGE-L

Many thanks to everyone who responded to my question, it really is
appreciated.

I totally missed the HAVING clause in the SQL book I was looking at, and
the AS clause wasn't listed. Time to get a more up to date book I
guess.

I tried both methods and noticed that over a file with 4,000,000+
records the HAVING returned the first page of results in approximately
24 seconds whilst the AS only took around 2 seconds.

All the best and thanks again

Jonathan

Rob@xxxxxxxxx wrote :

Birgitta's works also.

Get in the habit of using AS, especially in summations.
Like
select count(*) as TheCount...
This will rename your fields (excuse me, columns).

Might want to try it in a view that the users use to make the
more readable.
selection For example, instead of telling the users to join this file
this and that for a Query/400 query then just create this

CREATE VIEW QTEMP/OPENORDERS AS (
SELECT HCUST AS CUSTNBR,
HORD AS ORDERNBR,
HCPO AS CUSTPONBR,
LLINE AS ORDERLINE,
LPROD AS ITEMNBR,
LCLAS AS ITEMCLASS,
LQORD - LQSHP AS QTYLEFT,
NUMTODATE(LRDTE) AS DATEREQSTD,
CASE LSTAT
WHEN 'E' THEN 'DESC1'
WHEN 'I' THEN 'DESC2'
WHEN 'P' THEN 'DESC3'
ELSE 'DESC4'
END AS LINESTATUS,
LDESC AS ORDLINDESC,
CNME AS CUSTNAME,
CSAL AS SLSMANNBR
FROM GDIDIVF/ECH
LEFT OUTER JOIN GDIDIVF/ECL ON HORD=LORD
LEFT OUTER JOIN GDIDIVF/RCM ON HCUST=CCUST
)

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

From:
rob@xxxxxxxxx
To:
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date:
08/18/2009 10:26 AM
Subject:
Re: Referencing columns in temporary tables using SQL
Sent by:
midrange-l-bounces@xxxxxxxxxxxx

HAVING is your answer...

with t1 as ( select rpan8,
count(*) as TheCount
from f0311
group by rpan8
having count(*)>10000
order by rpan8
)
select * from t1

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

From:
"Jonathan Mason " <jonathan.mason@xxxxxxxxxxxxxxxx>
To:
<midrange-l@xxxxxxxxxxxx>
Date:
08/18/2009 09:55 AM
Subject:
Referencing columns in temporary tables using SQL
Sent by:
midrange-l-bounces@xxxxxxxxxxxx

to this and I am trying to run an SQL statement that creates a
which I want to run some selection criteria:

with t1 as ( select rpan8, count(*)
from f0311
group by rpan8
order by rpan8
)
select * from t1

temporary table over Ideally I would like to add a "WHERE" clause to
entries where the COUNT(*) is more than a given amount, say 10000.
However, I can't find any way to reference the generated column as I
don't know the internal name assigned to the column.

I have tried using "where count(*) 10000" and other variations, but

all to no avail. Does anybody have any ideas?

Thanks

Jonathan

Jonathan Mason
iSeries Consultant
www.astradyne-uk.com

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Jonathan Mason
iSeries Consultant
www.astradyne-uk.com

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