我正在尝试加入这些表:
我正在尝试构建的查询是分配给患者的顾问,要获取顾问名称,需要根据员工ID(STA_id)在员工和顾问身上加入JOIN。然后根据顾问ID(CON_id)加入顾问到患者。
这是我到目前为止所生成的内容:
SELECT CONCAT(Patient.PAT_f_name,' ',Patient.PAT_l_name) AS Patient_Name,
CONCAT(Staff.STA_f_name,' ',Staff.STA_s_name) AS Consultant_Name
FROM up637415_hospital.Patient
JOIN up637415_hospital.Consultant ON
up637415_hospital.Patient.CON_id=up637415_hospital.Consultant.CON_id
JOIN up637415_hospital.Staff ON
up637415_hospital.Consultant.STA_id=up637415_hospital.Consultant.STA_id
查询输出以下结果:
重复患者名称。
任何帮助将不胜感激,谢谢。
答案 0 :(得分:0)
我设法使用以下查询解决了这个问题:
SELECT CONCAT(Patient.PAT_f_name,' ',Patient.PAT_l_name) AS Patient_Name,
CONCAT(Staff.STA_f_name,' ',Staff.STA_s_name) AS Consultant_Name
FROM up637415_hospital.Patient
JOIN up637415_hospital.Consultant ON
up637415_hospital.Patient.CON_id=up637415_hospital.Consultant.CON_id
JOIN up637415_hospital.Staff ON
up637415_hospital.Consultant.STA_id=up637415_hospital.Consultant.STA_id
WHERE Staff.STA_id=Consultant.STA_id AND Consultant.CON_id=Patient.CON_id
我只需要使用where子句。