Oracle Error-ORA-00933：SQL 命令未正确结束

Question

我无法弄清楚为什么我会收到此错误消息....

SELECT student.student, course.coursename, course.coursehours, section.day, section.starttime, course.building, location.room

FROM student, course, section, location, registration

WHERE course.courseid = section.courseid, location.locationid = 
section.locationid, student.studentid = registration.sectionid, 
section.sectionid = registration.sectionid;

Error at line 3:
ORA-00933: SQL command not properly ended

我将数据更新为如下所示：

SELECT student.studentid, 
   course.coursename, 
   course.credithours, 
   section.days, 
   section.starttime, 
   location.building, 
   location.room 
FROM   student 
       INNER JOIN registration 
               ON student.studentid = registration.sectionid 
       INNER JOIN section 
               ON section.sectionid = registration.sectionid 
       INNER JOIN location 
               ON location.locationid = section.locationid 
       INNER JOIN course 
               ON course.courseid = section.courseid; 

但现在它说“没有选择行”？

Answer 1

当您有多个条件时，您需要使用AND/OR 运算符来应用条件而不是comma。也开始使用INNER JOIN语法

SELECT student.student, 
       course.coursename, 
       course.coursehours, 
       section.day, 
       section.starttime, 
       course.building, 
       location.room 
FROM   student 
       INNER JOIN registration 
               ON student.studentid = registration.sectionid 
       INNER JOIN section 
               ON section.sectionid = registration.sectionid 
       INNER JOIN location 
               ON location.locationid = section.locationid 
       INNER JOIN course 
               ON course.courseid = section.courseid