SV: Onfly, function generated ID for Select Query

[Gustavsson Mikael <mikael.gustavsson@xxxxxxx>]

No, the result will be ordered by the window functions order clause so no additional ordering is nessesary.
You can try this by changing it to OVER(ORDER BY product_name)

KR

Mikael

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Från: Durumdara <durumdara@xxxxxxxxx>
Skickat: den 10 mars 2023 08:41:06
Till: Gustavsson Mikael
Kopia: Postgres General
Ämne: Re: Onfly, function generated ID for Select Query

 

 Dear Mikael!

Wooooow... that is it!

Thank you!

SELECT product_id, product_name, group_id, ROW_NUMBER () OVER (ORDER BY product_id) FROM products;

Does this mean that I have to duplicate the order by clause?

SELECT product_id, product_name, group_id, ROW_NUMBER () 

    OVER (ORDER BY product_id, product_name, group_id) 

FROM products 

ORDER BY product_id, product_name, group_id

To get the same sequence in the ROW_ID-s, and the Query rows?

BR

dd

Gustavsson Mikael <mikael.gustavsson@xxxxxxx> ezt írta (időpont: 2023. márc. 10., P, 8:33):

Hi,

Is it something like row_number() you want?

https://www.postgresql.org/docs/current/functions-window.html

KR

Mikael

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Från: Durumdara <durumdara@xxxxxxxxx>
Skickat: den 10 mars 2023 8:12
Till: Postgres General
Ämne: Onfly, function generated ID for Select Query

 

Dear Members!

I'm searching for a simple solution, like this:

select GetIDForThisSelect(1, 1) as UID, * from anytablehasdoublestringkey

join othertablehasnotuniqueintegerkey ...

where ....

Ok, I can make a sequence, but I don't want to use persistent data.

It is enough to get 1...N as UID for this select.

Like generate_series, but that is generating rows.

Maybe you have some trick to do this.

Thank you for any assistance!

Best regards

dd