MySql sum 一列元素
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时间:2020-08-31 18:11:41 来源:igfitidea点击:
MySql sum elements of a column
提问by XCS
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...
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...
A B C
1. 2 2 2
2. 4 4 4
3. 6 6 6
MySql should return in this case, if I select all the three rows:
在这种情况下,如果我选择所有三行,MySql 应该返回:
A B C
1. 12 12 12
回答by nos
select sum(A),sum(B),sum(C) from mytable where id in (1,2,3);
回答by GolezTrol
select
sum(a) as atotal,
sum(b) as btotal,
sum(c) as ctotal
from
yourtable t
where
t.id in (1, 2, 3)
回答by Ike Walker
Try this:
尝试这个:
select sum(a), sum(b), sum(c)
from your_table