Question

I have an int field in my table scores. It can be a number between 0 and 100. There are over a 1000 rows in that table. I want to select the number of rows that fall between ranges 0-25, 26-50, 51-75 and 76-100.

So basically, if this is my scores table

score (int)
------------
 10
 20
 12
 56
 43
 90
 87

The output of the query should look like this ( let’s call the ranges R1, R2, R3, R4 )

R1   R2   R3   R4
------------------
3    1    1    2

Let me know if something’s not clear.

EDIT I got this far

SELECT CASE score
WHEN score BETWEEN 0 AND 25 THEN 'R1'
WHEN score BETWEEN 26 AND 50 THEN 'R2' 
WHEN score BETWEEN 51 AND 75 THEN 'R3' 
ELSE 'R4'
END, COUNT(*)
FROM scores

But when I put a AS range after END, I get an error. (UPDATE: nvm this, it supposed to be AS ‘range’, with quotes)

Also, if score is 0, it shows up under R2 and not R1. Why is that?

Answer 1

    create table scores (score int)

    insert into scores values(5);
    insert into scores values(15);
    insert into scores values(25);
    insert into scores values(30);
    insert into scores values(35);
    insert into scores values(40);
    insert into scores values(45);
    insert into scores values(55);
    insert into scores values(65);
    insert into scores values(80);
    insert into scores values(90);
    insert into scores values(95);
    insert into scores values(75);
    insert into scores values(50);


     select SUM(case t.rank when 1 then c else 0 end) as R1,
             SUM(case t.rank when 2 then c else 0 end) as R2,
             SUM(case t.rank when 3 then c else 0 end) as R3,
             SUM(case t.rank when 4 then c else 0 end) as R4
      from
      (         
        select TRUNCATE(score / 26,  0) + 1 rank, count(*) c
         from scores
        group by truncate(score / 26, 0) + 1
      ) t

result:

R1   R2  R3 R4
--------------
3    5    3  3