根據其他列中的條件求和多個列-SQL Teradata

Question

我想從下表中獲取第1列和第2列中每個縣的第3列和第4列的總分：

County1    |    County2     |   Player1_Score   |   Player2_Score
Norfolk    |    Hampshire   |       5           |       7
Suffolk    |    Norfolk     |       10          |       6
Hampshire  |    Suffolk     |       16          |       12
Norfolk    |    Suffolk     |       78          |       50
Hampshire  |    Norfolk     |       4           |       8
Suffolk    |    Hampshire   |       9           |       19

因此，我希望看到的結果如下：

Norfolk     |       97
Suffolk     |       77
Hampshire   |       32

誰能幫忙嗎？ 我嘗試執行SELECT/GROUP BY查詢，但對SQL來說還是一個新手，無法獲得所需的結果。

非常感謝

Answer 1

嘗試這個：

SELECT County, SUM(Score) AS TotalScore
FROM (                   
  SELECT County1 AS County, Player1_Score AS Score
  FROM mytable

  UNION ALL

  SELECT County2, Player2_Score
  FROM mytable) AS t
GROUP BY County
ORDER BY TotalScore DESC

在這里演示

Answer 2

SEL CNTRY,SUM(SUM1) FROM
(
SEL COUNTRY1 AS CNTRY, SUM(player_score_1) AS SUM1 FROM VT1
GROUP BY 1
UNION 
SEL COUNTRY2 AS CNTRY, SUM(player_score_2) FROM VT1
GROUP BY 1
) A
GROUP BY 1