# 1054 - Cột không xác định trong 'on clause'

Question

Tôi nhận được lỗi này: # 1054 - Cột không xác định 'examresults.userid' trong 'on clause'

Tôi đã xem các bài đăng khác nhưng tôi có thể ' t dường như con số nó ra. Tôi không nghĩ rằng tôi đang đề cập đến bất cứ điều gì ra khỏi trật tự ...

SELECT examinationresults.id AS id, examinationresults.examid AS examid, 
examination.tag AS examtag, examination.title AS examtitle, examinationresults.revision AS revision, 
examination.medicalspecialtyid AS medicalspecialtyid, medicalspecialties.title AS medicalspecialtytitle, 
examination.institutionid AS institutionid, institutions.title AS institutiontitle, 
examinationresults.grade AS grade, examinationresults.points AS points, examinationresults.pointsof AS pointsof, 
examinationresults.datebegan AS datebegan, examinationresults.datefinished AS datefinished, 
examinationresults.totaltime AS totaltime, examinationresults.finished AS finished, examinationresults.graded AS graded, 
users.username AS username, users.firstname AS firstname, users.middlename AS middlename, users.lastname AS lastname 
FROM examinationresults, examination 
INNER JOIN medicalspecialties 
    ON examination.medicalspecialtyid=medicalspecialties.id 
INNER JOIN institutions 
    ON examination.institutionid=institutions.id 
INNER JOIN users 
    ON examinationresults.userid=users.id 
WHERE examination.examid=examinationresults.examid AND examination.revision=examinationresults.revision AND examinationresults.userid='1' 
ORDER BY examinationresults.datefinished ASC; 

Answer 1

Bạn có

FROM examinationresults, examination 
INNER JOIN medicalspecialties /*....*/ 

Không trộn lẫn ANSI 89 và ANSI 92 tham gia các phong cách.

Sử dụng cú pháp INNER JOIN cho examinationresults và examination quá.

FROM examinationresults 
     INNER JOIN examination 
     ON examination.examid = examinationresults.examid 
      AND examination.revision = examinationresults.revision 
     INNER JOIN medicalspecialties 
     ON examination.medicalspecialtyid = medicalspecialties.id 
     INNER JOIN institutions 
     ON examination.institutionid = institutions.id 
     INNER JOIN users 
     ON examinationresults.userid = users.id 
WHERE examinationresults.userid = '1' 

Answer 2

Bạn quên sử dụng cú pháp INNER JOIN cho examinationresults và examination .Try này:

SELECT examinationresults.id AS id, examinationresults.examid AS examid, 
examination.tag AS examtag, examination.title AS examtitle, examinationresults.revision AS revision, 
examination.medicalspecialtyid AS medicalspecialtyid, medicalspecialties.title AS medicalspecialtytitle, 
examination.institutionid AS institutionid, institutions.title AS institutiontitle, 
examinationresults.grade AS grade, examinationresults.points AS points, examinationresults.pointsof AS pointsof, 
examinationresults.datebegan AS datebegan, examinationresults.datefinished AS datefinished, 
examinationresults.totaltime AS totaltime, examinationresults.finished AS finished, examinationresults.graded AS graded, 
users.username AS username, users.firstname AS firstname, users.middlename AS middlename, users.lastname AS lastname 

FROM examinationresults 
     INNER JOIN examination 
     ON examination.examid = examinationresults.examid 
      AND examination.revision = examinationresults.revision 
     INNER JOIN medicalspecialties 
     ON examination.medicalspecialtyid = medicalspecialties.id 
     INNER JOIN institutions 
     ON examination.institutionid = institutions.id 
     INNER JOIN users 
     ON examinationresults.userid = users.id 
WHERE examinationresults.userid = '1' 

Trên một mặt lưu ý:

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