MySql的GROUP BY和点心等列的总价值

Question

我有2列，像这样

我想要的结果是狗6，和大象2.我到目前为止做出（和失败）是本

SELECT字，SUM（量）FROM Data分组依据 '单词'

Answer 1

卸下单引号的周围。它使列名转换为字符串。

SELECT word, SUM(amount) 
FROM Data 
Group By word 

Answer 2

应该grave accent符号不single code

SELECT word, SUM(amount) 
FROM Data 
GROUP BY `word`; 

输出：

word  SUM(amount) 
dog   6 
Elephant  2 

Answer 3

SELECT word, SUM(amount) FROM Data Group By word; 

Answer 4

试试这种非传统的方法。

SELECT word, SUM(amount) 
FROM Data 
Group By word