Question

我有两个单独的MySQL查询，返回两组看起来像这样的结果

查询1结果：

country  | buyers | payment |  num_of_sales
UK       |   5    | 106.45  |    4
Thailand |   6    | 250.10  |    3

和

查询2结果：

country | buyers | payment |  num_of_sales
UK      |   2    | 150.00  |    1
Norway  |   9    | 310.80  |    2

我需要的是合并/合并它们，以便最终结果如下：

预期结果

 country | buyers | payment |  num_of_sales
 UK      |   7    | 256.45  |    5
Thailand |   6    | 250.10  |    3
 Norway  |   9    | 310.80  |    2

请帮助，如果可能的话，请加以解释。谢谢！

Answer 1

使用UNION ALL合并两个查询结果＆＃39;设置为一个结果集，然后使用GROUP BY country和SUM来获取您要查找的总数，如下所示：

SELECT
  country, 
  SUM(buyers) AS buyers, 
  SUM(payment) AS payment, 
  SUM(num_of_sales) AS num_of_sales
FROM
(  
   SELECT country, buyers, payment, num_of_sales
   FROM -- your query1 results
   UNION ALL
   SELECT country, buyers, payment, num_of_sales
   FROM -- your  query2 result2  
) AS t
GROUP BY country

将两个结果集与MySQL合并（或联合）

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