이 콘텐츠는 선택한 언어로 제공되지 않습니다.

14.13. The Group by Clause

A query that returns aggregate values can be grouped by any property of a returned class or components:

select cat.color, sum(cat.weight), count(cat)
from Cat cat
group by cat.color

select cat.color, sum(cat.weight), count(cat)
from Cat cat
group by cat.color

Copy to Clipboard

Toggle word wrap

select foo.id, avg(name), max(name)
from Foo foo join foo.names name
group by foo.id

select foo.id, avg(name), max(name)
from Foo foo join foo.names name
group by foo.id

Copy to Clipboard

Toggle word wrap

A having clause is also allowed.

select cat.color, sum(cat.weight), count(cat)
from Cat cat
group by cat.color
having cat.color in (eg.Color.TABBY, eg.Color.BLACK)

select cat.color, sum(cat.weight), count(cat)
from Cat cat
group by cat.color
having cat.color in (eg.Color.TABBY, eg.Color.BLACK)

Copy to Clipboard

Toggle word wrap

SQL functions and aggregate functions are allowed in the having and order by clauses if they are supported by the underlying database (i.e., not in MySQL).

select cat
from Cat cat
    join cat.kittens kitten
group by cat.id, cat.name, cat.other, cat.properties
having avg(kitten.weight) > 100
order by count(kitten) asc, sum(kitten.weight) desc

select cat
from Cat cat
    join cat.kittens kitten
group by cat.id, cat.name, cat.other, cat.properties
having avg(kitten.weight) > 100
order by count(kitten) asc, sum(kitten.weight) desc

Copy to Clipboard

Toggle word wrap

Neither the group by clause nor the order by clause can contain arithmetic expressions. Hibernate also does not currently expand a grouped entity, so you cannot write group by cat if all properties of cat are non-aggregated. You have to list all non-aggregated properties explicitly.

Report a bug

맨 위로 이동

이 콘텐츠는 선택한 언어로 제공되지 않습니다.

14.13. The Group by Clause

자세한 정보

평가판, 구매 및 판매

커뮤니티

Red Hat 문서 정보

보다 포괄적 수용을 위한 오픈 소스 용어 교체

Red Hat 소개

Theme

Red Hat legal and privacy links

Red Hat legal and privacy links