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  3. February 2021

Re: SQL - Using result fields in a calculation

With Amount as (select sum(ntramt) from dktntrpf where ntrnpd = 3913 and
ntrtty =
'UDD'),
Adjust as (select sum(ntramt) from dktntrpf where ntrnpd = 3913 and ntrtty =
'UDD')
Select npdsdt, npdedt, npdamt, npdsts, npdtno, npdabl, npdnph, npdnpd,
nphnab,
Cast(npdamt + adjust - amount As Decimal(11,2))
from dktnphpf, dktnpdpf
where nphcoy = 1 and nphnab = 'ND0001' and nphnph = npdnph;

The cast is not really needed but I like to define the type and size of any
variable I define.

I would recommend for testing that you test in pieces.

First

With Amount as (...)
Select * from amount;

If that works add the next piece and see that works. If both work add the
last piece,

That way you see if there is some other error in the code
Also I note you don't have a join clause. Deliberate?




On Sat, Feb 27, 2021, 6:50 PM Don Brown via MIDRANGE-L <
midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

Thank you for your reply Alan.

Would you be able to share an example as i have not used CTE's

Thanks





From: "Alan Campin" <alan0307d@xxxxxxxxx>
To: "Midrange Systems Technical Discussion"
<midrange-l@xxxxxxxxxxxxxxxxxx>
Date: 28/02/2021 12:47 PM
Subject: Re: SQL - Using result fields in a calculation
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxxxxxxxx>



Why not use CTE's. Much simpler code.



On Sat, Feb 27, 2021, 6:33 PM Don Brown via MIDRANGE-L <
midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

Hi,

I have the following SQL

select npdsdt, npdedt, npdamt, npdsts, npdtno, npdabl, npdnph, npdnpd,
nphnab,
(select sum(ntramt) from dktntrpf where ntrnpd = 3913 and ntrtty
=
'UDD') as amount,
(select sum(ntramt) from dktntrpf where ntrnpd = 3913 and ntrtty
=
'ADJ') as adjust,
npdamt + adjust - amount as avail
from dktnphpf, dktnpdpf
where nphcoy = 1 and nphnab = 'ND0001' and nphnph = npdnph;

I am running it in iACS

It fails indicating the variable "adjust" is not found.

I am obviously not using the correct terms when searching google as I
can't find an example of how to use the results or a sub select.

Any assistance would be appreciated.

Thanks

Don




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