How to create columns for different fields without applying the pivoting function

Question

So i have a question for the tough hearted! I have had an issue with this concept for awhile and I need it to be cleared... The following code shows students who have more than

Answer 1

A SQL query returns a fixed number of columns. If you want just three additional columns, then you can use dynamic aggregation:

with t as (
      SELECT s.studentnumber as studentnr, p.firstname AS name,
             sl.gradenumber as gradenumber, l.text as language,
             dense_rank() over (partition by s.studentnumber, p.firstname, sl.gradenumber order by l.text) as seqnum
      FROM student s JOIN 
           pupil p
           ON p.id = s.pupilid JOIN
           pupillanguage pl 
           ON pl.pupilid = p.id JOIN
           language l 
           ON l.id = pl.languageid JOIN
           schoollevel sl
           ON sl.id = p.schoollevelid
     )
select studentnr, name, gradenumber,
       max(case when seqnum = 1 then language end) as language_1,
       max(case when seqnum = 2 then language end) as language_2,
       max(case when seqnum = 3 then language end) as language_3
from t
group by studentnr, name, gradenumber;

However, if you want a variable number, then you need crosstab or dynamic SQL. I might also suggest that you consider arrays instead.