根据其他列中的条件求和多个列-SQL Teradata

Question

I would like to get a total of the scores from columns 3 & 4 for each of the counties in columns 1 & 2 from the table shown below:

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

So the results I would like to see would be as follows:

Norfolk     |       97
Suffolk     |       77
Hampshire   |       32

Can anyone please help with this? I tried a SELECT/GROUP BY query but am fairly new to SQL and couldn't get the results I wanted.

Many thanks

Answer 1

Try this:

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

Demo here

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