Re: Can an SQL common table expression be used for many different selects?

Here is another possibility. The CTE at the top would encapsulate your
complex query then in the select use the row_number() olap function to tell
you how many rows are left but to do that you have to order in the opposite
direction your result set is ordered by.

with complex as (
select table_name, table_owner
from qsys2.systables
)

select a.*, row_number() over(order by a.table_name desc)
from complex a
order by a.table_name

On Tue, Jul 28, 2020 at 8:07 AM Maria Lucia Stoppa <mlstoppa@xxxxxxxxx>
wrote:

@Joe
Yes, this is a good solution that I can apply.
Than you

Il giorno mar 28 lug 2020 alle ore 15:05 Joe Pluta <
joepluta@xxxxxxxxxxxxxxxxx> ha scritto:

Here's a very dumb option off the top of my head:

with T1 as (select A, B, ..., Z from ...)
select count(*), '' as A, 0 as B, ..., ' ' as Z from T1
union 0, A, B, ..., Z from T1

The first line creates your CTE. The second line creates a count record
where the first field is the count and all the other fields are blank or
zero, the third line brings in all the records from the CTE but with 0
in the count field.

Short of a temporary table, that's the best I can come up with, and it
doesn't address doing a bunch of other subselects on that data. For
that, I definitely think you need a temporary table.


On 7/28/2020 7:52 AM, Maria Lucia Stoppa wrote:

@Vernon,
I didn't attach any example because it's really complex, but you got it
right.
As you stated, select statements can't return more than one result, so

I

was wondering if it's possible to use a CET to serve multiple selects,

and

it seems it's not.
Yes, the many selects that run have the same from clause and where

clause

(built with host variables as you imagined), that's why I hoped I

missed

some tricks or ways to do things.
Thank you

Il giorno mar 28 lug 2020 alle ore 14:34 Vernon Hamberg <
vhamberg@xxxxxxxxxxxxxxx> ha scritto:

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Maria Lucia Stoppa
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