每个行组合的 SQL 总计

Question

是否有任何类型的聚合函数可以帮助计算以下内容？

如果我有以下数据，我想要每个重复行的总和。

   date    |  country     | color | measure |  left | position 
---------------------------------------------------------------
2020-02-01  united states  red        33       5.3      none  
2020-02-01  united states  red        33       5.3      none  
2020-02-01  united states  red        33       5.3      none  
2020-02-03  vietnam        green      44       9.2      none  
2020-02-01  united states  red        33       5.3      none  
2020-02-01  united states  red        33       5.3      none  
2020-02-03  vietnam        green      44       9.2      none  
2020-02-01  canada         yellow     20       3.1      none  
2020-02-06  mexico         orange     2        9.0      miss
2020-02-06  mexico         red        1        3.0      none

输出将提供total 每行出现的数字：

   date    |  country     | color | measure |  left | position | total
-----------------------------------------------------------------------
2020-02-01  united states  red        33       5.3      none      5
2020-02-03  vietnam        green      44       9.2      none      2
2020-02-01  canada         yellow     20       3.1      none      1
2020-02-06  mexico         orange     2        9.0      miss      1
2020-02-06  mexico         red        1        3.0      none      1

Answer 1

为什么不是好旧的group by 和count？

  select date,
         country,
         color,
         measure,
         left,
         position,
         count(1) as total      
    from MyTable
group by date,
         country,
         color,
         measure,
         left,
         position