Arrays postgreSQL：加入并分组以获得正确的查询结果

我是一名postgreSQL新手，我被以下问题困住了

理想的产出将是

id |   name      | address | description | employees
1  |  'company1' | 'asdf'  |  'asdf'     | [{id: 1, name: 'Mark'}, {id: 2, name: 'Mark'}, {id: 3, name: 'Steve'}, {id: 4, name: 'Mark'}]
2 ...
3 ...
5  |  'company5' | 'asdf   | 'adsf'      | []

我的当前查询（该查询不工作）

共有3个表格：

companies : ID, NAME, ADDRESS, DESCRIPTION
employees : ID, NAME, SALARY, ROLE
companies_employees : EMPLOYEE_ID, COMPANY_ID 
(CONSTRAINT companies_employees_employee_fkey FOREIGN KEY(employee_id) REFERENCES employees(id),
CONSTRAINT companies_employees_company_fkey FOREIGN KEY(company_id) REFERENCES companies(id) ) 

示例表是[

也许“分组方式”不适合使用

请你给我指一下正确的方向好吗？ 非常感谢您

您的问题是，您正在按条件显示员工数据并在分组中使用这些数据。这些字段具有唯一值。您只想按公司信息分组：

SELECT
  companies.*,json_agg(employees.*) as "employees"
FROM
  companies_employees
  JOIN companies ON companies_employees.COMPANY_id = companies.ID
  JOIN employees ON companies_employees.EMPLOYEE_id = employees.ID
GROUP BY 
  companies.ID, 
  companies.NAME, 
  companies.ADDRESS,
  companies.DESCRIPTION

---

太棒了。这就是我要找的。你救了我一天。谢谢！

SELECT
  companies.*,json_agg(employees.*) as "employees"
FROM
  companies_employees
  JOIN companies ON companies_employees.COMPANY_id = companies.ID
  JOIN employees ON companies_employees.EMPLOYEE_id = employees.ID
GROUP BY 
  companies.ID, 
  companies.NAME, 
  companies.ADDRESS,
  companies.DESCRIPTION