MySql sum 一列元素

2021-11-20 00:00:00 sum mysql

我有一个包含 3 列(A、B、C)的表格.我想从表中选择一些行，然后 MySQL 返回单行，其中每列都添加了值...

I have a table with 3 columns (A,B,C). I want to select some rows from the table and then the MySQL to return a single row having the values added on each column...

   A B C
1. 2 2 2
2. 4 4 4
3. 6 7 8

在这种情况下，如果我选择所有三行，MySql 应该返回:

MySql should return in this case, if I select all the three rows:

   A   B  C
1. 12  13 14

推荐答案

 select sum(A),sum(B),sum(C) from mytable where id in (1,2,3);

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