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From: Erland Sommarskog <esquel@sommarskog.se>
Newsgroups: comp.databases.ms-sqlserver
Subject: Re: How to I select to show only those that have more than one Horse
Date: Sun, 08 Feb 2015 11:45:06 +0100
Organization: Erland Sommarskog
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Tony Johansson (johansson.andersson@telia.com) writes:
> One Rider can own many Horses but one Horse can only be owned by one
> Rider. 
> This query list all the relation between a Rider and a Horse.
> 
> select Rider.Namn, Horse.Namn as Horsename
> from Rider, Horse
> where Horse.RiderID= Rider.SocNr
> order by Rider.Namn
> 
> Name                      Horsename
>  Adeline Falk           Vilja F
> Anna Westman         Solidago
> Anna Westman         early morning grey
> Corola Häggqvist     Com-on Landlyst

Corola? Are you trying to avoid trade-mark infringement? :-)

For instance:

; WITH CTE AS (
    SELECT R.Name, H.Namn AS Horsname, 
           COUNT(*) OVER(PARTITION BY R.SocNr) AS cnt
    FROM   Rider R
    JOIN   Horse H ON H.RiderID = R.SocNr
)
SELECT Name, Horsename
FROM   CTE
WHERE  cnt >= 2


-- 
Erland Sommarskog, Stockholm, esquel@sommarskog.se