我如安在where子句中包括聚合列？

我有一个2列的表farmer_crops,用于存储农夫与其栽培的农作物之间的相关.农夫可以栽培一种或多种农作物.下面的查询为我提供了差异的农夫和他们栽培的农作物.我奈何才气使栽培农作物的农夫总数高出一(my_crops> 1)？

select distinct farmer_id,count(crop_id) as my_crops 
from farmer_crops 
group by farmer_id

[编辑]行使GMB的提醒,下面的查询向我提供了总共2330行,这是正确的.

SELECT farmer_id,count(crop_id) as my_crops 
FROM farmer_crops 
GROUP BY farmer_id
HAVING count(crop_id) > 1

可是,我真正想要的是下面的查询,只是总数,可是total_farmers列返回的数字8330是错误的.

SELECT count(farmer_id) as total_farmers 
FROM farmer_crops
HAVING count(crop_id) > 1

SELECT farmer_id,count(crop_id) as my_crops 
FROM farmer_crops 
GROUP BY farmer_id
HAVING count(crop_id) > 1

与WHERE子句差异,HAVING子句位于GROUP BY子句之后.

留意：SELECT DISTINCT凡是对付GROUP BY没故意义,我将其删除.

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