JPA计数查询具有最大结果

Question

请您分享我通过JPA编写的代码片段，以便生成以下的SQL查询

> chipsArray = [{'cheetos':'good'},{'dorritos':'better'}]
[ { cheetos: 'good' }, { dorritos: 'better' } ]
> Object.values(chipsArray[0])
[ 'good' ]

因为我试过以下方式。但MaxResults似乎没有被应用，因为我能够收到超过10的计数。

SELECT COUNT(*) FROM Customer c 
WHERE c.countryId ='Canada' AND 
      c.lanuguage ='ENG' AND 
      ROW_NUM <=10;

Answer 1

选择计数将始终返回单个值。如果您希望计数低于10，请添加HAVING。

SELECT COUNT(c) AS 
FROM Customer c
WHERE c.countryId='Canada' and c.language='END'
HAVING COUNT(c)<=10