在mysql中进行分组和计数

Question

我在尝试将发生在一行中的所有单词分组，并计数它们的freq值并按计数结果进行排序。它只能在sql中完成。这里有一个例子：

我有如下表：

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

，并希望得到这样的结果：

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

Answer 1

您可以通过组词，后来根据制作组来总结.. ...

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

当你必须根据freq命令单词时，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;