Group By和限制mySql中的输出

Question

我在语法上遇到困难。我知道错误在哪里，但无法找到正确的线。

可以说在尝试计算食物组时，我想看看食物组的详细计数。

这个伟大的工程：

SELECT FoodGroup, Count(*) as mycount 
FROM Food 
Group By FoodGroup 

我得到一个不错的输出

Vegies 190 
Spices 64 
breads 16 

但我想限制我输出到那些有50名或更多的项目

SELECT FoodGroup, Count(*) as mycount 
FROM Food 
Where mycount > 49 <--this line in the issue 
Group By FoodGroup 

什么都要WHERE子句看起来像什么？

Answer 1

请试试这个：

SELECT FoodGroup, Count(*) as mycount 
FROM Food 
Group By FoodGroup 
Having mycount > 49 

Answer 2

你可以做到这一点使用HAVING条款，而不是WHERE如下

SELECT FoodGroup, Count(*) as my_count 
FROM Food 
GROUP BY FoodGroup 
HAVING my_count > 49