MySQL的「GROUP BY」從兩個連接的查詢

Question

我公司生產的下方返回以下結果查詢：

mysql> select u.username, s.campaignno, if(f.hometeamscore>f.awayteamscore,1,0) as Win, f.hometeamscore as Goals from straightred_fixture f, straightred_userselection s, auth_user u where s.fixtureid = f.fixtureid and s.teamselectionid = f.hometeamid and s.user_id = u.id union all 
    -> select u.username, s.campaignno, if(f.awayteamscore>f.hometeamscore,1,0) as Win, f.awayteamscore as Goals from straightred_fixture f, straightred_userselection s, auth_user u where s.fixtureid = f.fixtureid and s.teamselectionid = f.awayteamid and s.user_id = u.id; 
+------------+------------+-----+-------+ 
| username | campaignno | Win | Goals | 
+------------+------------+-----+-------+ 
| tingeyal | 34910256 | 1 |  5 | 
| shanu  | 35410256 | 1 |  4 | 
| tingeyal | 34910256 | 0 |  0 | 
| kOS  | 35210256 | 1 |  2 | 
| kOS  | 35210256 | 0 |  0 | 
| shanu  | 35410256 | 1 |  3 | 
| kriste8403 | 35510256 | 1 |  3 | 
| kriste8403 | 35510256 | 0 |  0 | 
+------------+------------+-----+-------+ 
8 rows in set (0.00 sec) 

不過，我想只返回一行對每個用戶名& campaignno組合相加無論是「贏「和」目標「欄。在上面的例子中，我想查詢返回以下內容：

+------------+------------+-----+-------+ 
| username | campaignno | Win | Goals | 
+------------+------------+-----+-------+ 
| tingeyal | 34910256 | 1 |  5 | 
| shanu  | 35410256 | 2 |  7 | 
| kOS  | 35210256 | 1 |  2 | 
| kriste8403 | 35510256 | 1 |  3 | 
+------------+------------+-----+-------+ 
4 rows in set (0.01 sec) 

我相信這會涉及到羣組？或者，也許我必須創建一個新的查詢並將其與此結合。正如你所看到的，我不確定我的下一步應該是什麼。如果有人認爲這將是有幫助的有表格的細節，然後讓我知道。

非常感謝。

Answer 1

我相信這會涉及到羣組？

是的，它會的。爲了獲得理想的結果，您不必編寫單獨的查詢。嘗試下面。

SELECT tablea.username, tablea.campaignno, SUM(tablea.Win) Win, SUM(tablea.Goals) Goals 
FROM 
(select u.username, s.campaignno, if(f.hometeamscore>f.awayteamscore,1,0) as Win, f.hometeamscore as Goals from straightred_fixture f, straightred_userselection s, auth_user u where s.fixtureid = f.fixtureid and s.teamselectionid = f.hometeamid and s.user_id = u.id 
union all 
select u.username, s.campaignno, if(f.awayteamscore>f.hometeamscore,1,0) as Win, f.awayteamscore as Goals from straightred_fixture f, straightred_userselection s, auth_user u where s.fixtureid = f.fixtureid and s.teamselectionid = f.awayteamid and s.user_id = u.id) AS tablea 
WHERE 1 
GROUP BY tablea.username 

上面的語句將創建兩個子查詢的臨時表tablea包含數據並獲取所需的數據。