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help / color / mirror / Atom feedFrom: David G. Johnston <[email protected]>
To: Shaozhong SHI <[email protected]>
Cc: pgsql-sql <[email protected]>
Subject: Re: How to select the last value/row?
Date: Thu, 6 Jul 2023 09:09:36 -0700
Message-ID: <CAKFQuwZuhDQ3GsQLreBB15SvehBRz_iJhFoo-qxgtAgmiEXSOQ@mail.gmail.com> (raw)
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On Thu, Jul 6, 2023 at 9:02 AM Shaozhong SHI <[email protected]> wrote:
>
> How about
> ID
> 5
> 4
> 3
> 3
> 2
> 3
>
> The last is 3.
>
>
There is no concept of "last" in a query unless you define an order. If
you really want whatever row really happens to randomly show up in the last
result row the use the "row_number()" window function to give each row a
number and then sort and limit on that.
David J.
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Subject: Re: How to select the last value/row?
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