Some format help

Question

Hi,
Thiis is my query.While returning data if coulmn value is single digit i need display with two decimals.
For example o/p is 5 need to 5.00.Pls see the query and output.
my database is 10.1.0.2.0
current o/p
Mean Score     Standard Deviation
4.99     0.17
5     0.15
5     0.12
5     0.08
5     0.14
5     0.11
5     0.09
expected o/p
4.99     0.17
5.00     0.15
5.00     0.12
5.00     0.08
5.00     0.14
5.00     0.11
5.00     0.09
select
       nvl(decode(s1.Student_count,0,'0',round((s1.ss_sum/s1.student_count),2)),0)"Mean Score" ,
       nvl(s1.Std_deviation,0)"Standard Deviation"
  from test_detail tt,
       test_detail td,
       select test_detail_id,
              count(1) Student_count,
              nvl(round(stddev(round(score)),2),0) Std_deviation,
              sum(round(score)) ss_sum
         from sm_dgn_test_session a
        where TRUNC(a.TEST_SESSION_DATE) between TO_DATE ('07/30/2009',
                                                          'MM/DD/YYYY')
                                             AND  TO_DATE ('11/01/2009',
                                                           'MM/DD/YYYY')
          and to_char(a.institution_id) in (295)
        group by test_detail_id
       ) s1,
         select a.test_detail_id,
                count(decode(category_score,1,1,null)) proficiency_1,
                count(decode(category_score,2,2,null)) proficiency_2,
                count(decode(category_score,3,3,null)) proficiency_3
           from sm_dgn_test_session a,
                ability_lookup_sem b
          where round(a.score) = b.scale
           and a.test_detail_id=b.test_detail_id
            and category_score in(1,2,3)
            and TRUNC(a.TEST_SESSION_DATE) between TO_DATE ('07/30/2009',
                                                          'MM/DD/YYYY')
                                             AND  TO_DATE ('11/01/2009',
                                                           'MM/DD/YYYY')
            and to_char(a.institution_id) in (295)
          group by a.test_detail_id
       ) s2
  where tt.test_detail_Id = td.domain_map_id
   and td.test_detail_id = s1.test_detail_id(+)
   and td.test_detail_id = s2.test_detail_id(+)
   and tt.test_type_id in (8)
   and to_char(tt.test_detail_id) in (303,304,305,306)

Answer 1

select  trunc("Mean Score") || to_char(mod("Mean Score",1),'fm.00') "Mean Score",
"Standard Deviation"
from (
select
       nvl(decode(s1.Student_count,0,'0',round((s1.ss_sum/s1.student_count),2)),0)"Mean Score" ,
       nvl(s1.Std_deviation,0)"Standard Deviation"
  from test_detail tt,
       test_detail td,
       select test_detail_id,
              count(1) Student_count,
              nvl(round(stddev(round(score)),2),0) Std_deviation,
              sum(round(score)) ss_sum
         from sm_dgn_test_session a
        where TRUNC(a.TEST_SESSION_DATE) between TO_DATE ('07/30/2009',
                                                          'MM/DD/YYYY')
                                             AND  TO_DATE ('11/01/2009',
                                                           'MM/DD/YYYY')
          and to_char(a.institution_id) in (295)
        group by test_detail_id
       ) s1,
         select a.test_detail_id,
                count(decode(category_score,1,1,null)) proficiency_1,
                count(decode(category_score,2,2,null)) proficiency_2,
                count(decode(category_score,3,3,null)) proficiency_3
           from sm_dgn_test_session a,
                ability_lookup_sem b
          where round(a.score) = b.scale
           and a.test_detail_id=b.test_detail_id
            and category_score in(1,2,3)
            and TRUNC(a.TEST_SESSION_DATE) between TO_DATE ('07/30/2009',
                                                          'MM/DD/YYYY')
                                             AND  TO_DATE ('11/01/2009',
                                                           'MM/DD/YYYY')
            and to_char(a.institution_id) in (295)
          group by a.test_detail_id
       ) s2
  where tt.test_detail_Id = td.domain_map_id
   and td.test_detail_id = s1.test_detail_id(+)
   and td.test_detail_id = s2.test_detail_id(+)
   and tt.test_type_id in (8)
   and to_char(tt.test_detail_id) in (303,304,305,306)
/SY.