選擇時和總計

Question

我有表匹配和我需要總和的目標。如果Match.Home_team='Tupesy'我需要總和Match.Home_team='Tupesy'，否則sum的Match.Away_goals。

現在我有這個，但是是完全錯誤的：/

SELECT *, 
    CASE (Match.Home_team) 
     WHEN (Match.Home_team='Tupesy')THEN (SUM(Match.Home_goals)) 
     ELSE (SUM(Match.Away_goals)) 
     END 
FROM Match 
Where (Match.ID_match='1'); 

Answer 1

這可能是這樣的（SUM和本案應以相反的順序來寫的）：

select Sum(case 
      when (Home_Team = 'Tupesy') then 
       Home_goals 
      else 
       Away_goals 
      end) 
    from Match 
where (ID_match = '1')