如何让医生在系统中拥有多个报告专业

Question

我有3张桌子

Reportingspeciality

ID  Speciality     HospitalName
1    Neurology      Sun
2    Emergency      Jefferson
5    Pulmonary      Mary
5    Anesthesiology Mayo

PhysicianJMGreportiongspeciality

ID JMGReportingSpeciality 11医师助理 17麻醉学 21麻醉学

PhysicianName

FirstName  LastName      ID
Sam         ABC           5
Joseph      DEF           2
Sam         ABC           5
Jackson     DEF           1

想要输出

FirstName   LastName    ID   Hospital  Specialty
Sam           ABC       5     Mary      Pulmonary
Sam           ABC       5     Mayo      Anesthesiology

也按ID和医院分组 麻醉学是表格中的不良数据，我必须在结果中获得。

Answer 1

显而易见的查询有什么问题？

SELECT 
  FirstName,
  LastName,
  PhysicianName.ID,
  HospitalName
FROM
  PhysicianName
INNER JOIN
  Reportingspecialty
ON
  PhysicianName.ID = Reportingspecialty.ID
GROUP BY
  PhysicianName.ID, HospitalName

为什么名称表中有两个完全相同的行？