Question

I have a two tables which are linked by a one-to-many relationship. Now I need to sort the rows based on the key which I have in my first table.

For Ex

TeacherID    StudentID
  1               1
  1               2
  1               3
  1               4
  1               5
  1               6
  1               7
  1               8
  2               9
  2               10
  2               11
  2               12

If I sort the Rows based on by teacherID, the student id’s are changing for each and every execution.

In the result set the studentID are changing in the random order. Now I need the studentID‘s not to be changed.

Is there anything I can do, to solve this problem without using sort by the studentID column.

Answer 1

You can sort on both.

ORDER BY
  TeacherID, StudentID

Selecting data from any database engine without specifying an ORDER BY doesn’t guarantee any order at all.