Re: special join

Jan Novak <[email protected]> Mon, 7 Sep 2020 14:50:09 +0200
Newsgroups comp.databases.mysql
Organization MB-NET.NET for Open-News-Network e.V.
Message-ID <[email protected]>
Am 07.09.20 um 14:16 schrieb The Natural Philosopher:
> On 07/09/2020 12:52, Nikolaj Lazic wrote:
>> Dana Mon, 7 Sep 2020 12:26:14 +0200, Jan Novak <[email protected]> 
>> napis'o:
>>> Hi,
>>>
>>> i have a table "server" with auto_increment field ID and a table "ip",
>>> with a filed "SERVER_ID" corrosponding to "server.ID"
>>>
>>> select ip.VALUE as "ip" from server, ip where server.DELETED=0 and
>>> server.ID=ip.SERVER_ID
>>>
>>> If in "ip" table for the server are more then one ip adress are saved, i
>>> get in my results the server also more then one time listed.
>>>
>>> My question is: how can i get only the server with the first IP from the
>>> ip Table, if more then one ip's saved there.
>>
>> group by... count... and then select those >1.
>>
>> https://www.w3resource.com/sql/aggregate-functions/count-with-group-by.php 
>>
>>
> distinct.. Not unique as I said earlier

i think, thats not the right way.
With distinct, i get different IP Adresses. But in the ip Table, there 
are only different ip addresses, therefor it should  not help.

Jan