Sous-sélection Colonne Numéro non valide

Question

J'ai un problème sql avec les noms de colonne dans un sous-menu, car je ne peux pas lui attribuer ce nom mais je ne sais pas comment le réorganiser.

select Distinct Captains.Name, Captains.Team, (select count(Winners.Name) from (select HomeTeamCaptain As Name from fixture where fixture.HomeTeamCaptain = Captains.Name And fixture.matchResult = fixture.HomeTeam UNION ALL select AwayTeamCaptain As Name from fixture where fixture.AwayTeamCaptain = Captains.Name And fixture.matchResult = fixture.AwayTeam) As Winners) As Winners From (select fixture.HomeTeamCaptain As Name, HomeTeam As Team From fixture UNION ALL select fixture.AwayTeamCaptain As Name, AwayTeam As Team From fixture) As Captains order by Name; 

Le « Captains.Name » est la question que je besoin pour exécuter le comte - Subselect mais ne peut pas mettre la main sur sa valeur!

Answer 1

Cela fonctionne pour moi:

select distinct Captains.Name, Captains.Team, 
    (select count(*) 
    from fixture 
    where 
     --I changed this a bit 
     (fixture.HomeTeamCaptain = Captains.Name And 
     fixture.matchResult = fixture.HomeTeam) 
    OR 
     (fixture.AwayTeamCaptain = Captains.Name And 
     fixture.matchResult = fixture.AwayTeam) 
    ) As Winners 

FROM (select fixture.HomeTeamCaptain As Name, HomeTeam As Team 
    from fixture 
    UNION ALL 
    select fixture.AwayTeamCaptain As Name, AwayTeam As Team 
    from fixture) AS Captains 
order by Captains.Name; 

Vous devriez envisager la création d'une table Captains et référence "Home" et capitaines "Away" par un identifiant.