MySQL的語法錯誤對於複雜查詢

Question

這裏是複雜的查詢，我寫的，但不能弄清楚什麼問題：

SELECT student.progid, 
    student.batch 
FROM (student 
    JOIN registers 
     ON student.studentid = registers.studentid) 
    JOIN (SELECT offers.courseno 
     FROM (offers 
       JOIN instructor 
        ON offers.instructorid = instructor.instructorid)) 
    ON offers.courseno = registers.courseno 
WHERE instructor.instructorname = 'P M Jaat' 
    AND (offers.acadyear LIKE '2007%' 
      OR offers.acadyear LIKE '2008%' 
      OR offers.acadyear LIKE '2009%' 
      OR offers.acadyear LIKE '2010%' 
      OR offers.acadyear LIKE '2011%'); 

這將導致一個錯誤，但我會離開它別人告訴你這是什麼：

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds 
to your MySQL server version for the right syntax to use near 'R1 
    JOIN (SELECT 

Answer 1

仔細檢查你的括號。您的FROM條款是

(student JOIN registers ON student.StudentID=registers.StudentID) 

這是沒有意義的。

你想要的是：

FROM (student) 
JOIN registers AS r1 
    ON (student.StudentID=registers.StudentID) 

或者，你可以失去多餘的括號：

FROM student 
JOIN registers AS r1 
    ON student.StudentID=registers.StudentID 

附：你也有你的AS r1在錯誤的地方。

更新：當您使用子查詢時需要括號。

FROM student 
JOIN registers 
    ON student.studentid = registers.studentid 
JOIN(
    SELECT courseno 
    FROM offers 
    JOIN instructor 
    ON offers.instructorid = instructor.instructorid 
) AS r2 ON offers.courseno = registers.courseno 

Answer 2

也許你是這樣的事情後...

SELECT r.progid 
     , r.batch 
     FROM student s 
     JOIN registers r 
     ON r.studentid = s.studentid 
     JOIN offers o 
     ON o.courseno = r.courseno 
     JOIN instructor i 
     ON i.instructorid = o.instructorid 
    WHERE i.instructorname = 'P M Jaat' 
     AND o.acadyear BETWEEN '2007-01-01' AND '2011-12-31';