MySql的GROUP BY和點心等列的總價值

Question

我有2列，像這樣

我想要的結果是狗6，和大象2.我到目前爲止做出（和失敗）是本

SELECT字，SUM（量）FROM Data分組依據 '單詞'

Answer 1

卸下單引號的周圍。它使列名轉換爲字符串。

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

Answer 2

應該grave accent符號不single code

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

輸出：

word  SUM(amount) 
dog   6 
Elephant  2 

Answer 3

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

Answer 4

試試這種非傳統的方法。

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