在mysql中進行分組和計數

Question

我在嘗試將發生在一行中的所有單詞分組，並計數它們的freq值並按計數結果進行排序。它只能在sql中完成。這裏有一個例子：

我有如下表：

word | freq 
----------- 
car | 5 
cake | 2 
car | 4 

，並希望得到這樣的結果：

word | freq 
----------- 
car | 9 
cake | 2 

Answer 1

您可以通過組詞，後來根據製作組來總結.. ...

SELECT word,SUM(freq) AS freq FROM tblName GROUP BY word 

當你必須根據freq命令單詞時，你可以使用ORDER BY in followi NG方式：

SELECT word,SUM(freq) AS freq FROM tblName GROUP BY word ORDER BY freq DESC 

Answer 2

SELECT word, SUM(freq) AS freq FROM yourTable GROUP BY word ORDER BY freq DESC;