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help / color / mirror / Atom feedFrom: Stöcker, Martin <[email protected]>
To: Shaozhong SHI <[email protected]>
To: pgsql-sql <[email protected]>
Subject: AW: select only 1 pair
Date: Mon, 24 Oct 2022 14:51:26 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <CA+i5Jwa5VR7vJ=9S-9-d_3HgxQ_MmqwLW9+vqeN=jNDUVSVCHQ@mail.gmail.com>
References: <CA+i5Jwa5VR7vJ=9S-9-d_3HgxQ_MmqwLW9+vqeN=jNDUVSVCHQ@mail.gmail.com>
select id1, id2 from table where id1<id2;
Mit freundlichen Grüßen
Martin Stöcker
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Email: [email protected]<mailto:[email protected]>
Von: Shaozhong SHI <[email protected]>
Gesendet: Montag, 24. Oktober 2022 16:44
An: pgsql-sql <[email protected]>
Betreff: select only 1 pair
There are pair ids. Each pair is repeated.
id1 id2
1 2
2 1
3 4
4 3
How to only select 1 unique pair for each?
Regards,
David
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