计算一列的总和并按具有相同值的列分组

Question

如何选择数字列的总和，然后按名称分组

name | number
a    | 100
b    | 10
a    | 50
b    | 40
c    | 200
a    | 20

expected result :

name | number
a    | 170
b    | 50
c    | 200

Answer 1

SELECT name, 
SUM (number)
FROM tablename
GROUP BY name;

Answer 2

我明白了，对不起

SELECT NAME, SUM(NUMBER) AS NUMBER FROM TABLE GROUP BY NAME