我有PostgreSQL的數據庫表中「字」: CREATE TABLE word
(
word_id bigserial NOT NULL,
word character varying(15) NOT NULL,
counter integer NOT NULL,
base_letters character varying(15),
CONST
在我的應用程序有哪些有權限的角色,我曾經這樣做: Query query =
em.createQuery(
"SELECT distinct r FROM Role r left join fetch r.permissions "
+ "where r.domain = ? " + "order by r.createdOn ").setParameter
我有一個數據模型,其中一個帳戶可以有多個用戶: class Account {
Long id;
}
class User {
Long id;
@ManyToOne
Account account;
}
我想要做的,其顯示每個帳戶的用戶數以下查詢: select Account.id, NumUsers.num from Account,