Question

如何按员工对以下查询的结果进行分组？

好的，所以我有三张桌子： 1. company_employee，其中包含映射到公司ID（company.id）的员工ID（company_employee.employee）。它还包含员工角色

员工，其中包含员工名，姓氏
包含ID和名称

现在我正在检索具有某个角色的所有员工，但是我为同一个员工获得了多个具有不同公司映射的条目。这样的事情：我的疑问是：

SELECT company_employee.employee, company_employee.company, employee.fname, employee.lname, company.name
 FROM company_employee
 JOIN employee on employee.id = company_employee.employee
 JOIN company on company.id = company_employee.company
 WHERE company_employee.role= 185;

我的结果是：

company_employee.employee     company_employee.company     employee.fname     employee.lname    company.name
111                           100                          John               Smith             Super Candy
111                           101                          John               Smith             Red Ballons
222                           102                          Kevin              Lora              Super Computers
111                           103                          John               Smith             Star Events
222                           104                          Kevin              Lora              Vintage Pencils
333                           105                          Margarett          Bush              Top Security

我想得到的是这种类型的清单：

Employee 111 John Smith mapped to a list of companies (100, 101, 103)
Employee 222 Kevin Lora mapped to a list of companies (102, 104)
Employee 333 Margarett Bush mapped to a list of companies (105)

这可能吗？

Answer 1

好像您正在寻找listagg功能：

SELECT   company_employee.employee, employee.fname, employee.lname, 
         LISTAGG(company_employee.company) 
           WITHIN GROUP (ORDER BY company_employee.company),
         LISTAGG(company.name) 
           WITHIN GROUP (ORDER BY company_employee.company),
FROM     company_employee
JOIN     employee ON employee.id = company_employee.employee
JOIN     company ON company.id = company_employee.company
WHERE    company_employee.role = 185
GROUP BY company_employee.employee, employee.fname, employee.lname

按给定字段对多个SQL结果进行分组

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