Question

我对问题的输出是： -

FIRSTNAME  COURSENAME
---------- --------------------
Anand      C++
Bala       C++
Dileep     Linux and C
Gowri      Java
Gowri      Linux and C
Gowri      C#
John       C++
John       Oracle
Prem       Linux and C
Priya      Java
Priya      Oracle
Priya      C#
Rahul      Oracle

但预期的输出是： -

FIRSTNAME  COURSENAME
---------- --------------------
Anand      C++
Bala       C++
Dileep     Linux and C
Gowri      C#
Gowri      Java
Gowri      Linux and C
John       C++
John       Oracle
Prem       Linux and C
Priya      C#
Priya      Java
Priya      Oracle
Rahul      Oracle

我的代码：

select firstname, coursename
from course
inner join
    (select student.firstname as firstname, registration.courseid
     from student
     inner join registration on student.studid = registration.studid
     group by student.firstname, registration.courseid) q1 on q1.courseid = course.courseid
order by firstname asc;

如何按升序排列两列保持另一列固定？（也许我在解释这个问题时听起来不太好）

Answer 1

order by firstname, coursename

或者

order by firstname asc, coursename asc

如何在SQL中订购两列？

1 个答案: