stored procedures - sql: select average grade for all subjects for one student and print an according message -

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i have table student following columns:

id  subject  grade   date ---|-------|------|-----------| 1  |     |  1   | 01-mar-10 |  1  |     |  5   | 05-apr-10 |  1  | b     |  3   | 01-jun-10 |  2  |     |  1   | 01-mar-10 |  2  | c     |  3   | 01-apr-10 |

in procedure pass student id (p_id), , need select average grade of subjects student, if student has 2 grades same subject, latest grade counts, this:

for p_id=1:

id  avggrade ---|--------| 1  | 4      |

this done now

what need now, save information student's success in string , print dbms_output. highest grade 1, lowest 5. if student had single 5 (as last grade subject), no matter average has, string should contain "the student failed", if student had no 5 last grade, , had average of <= 1,5 , string should contain "perfect average", otherwise "the student passed"

the code far is:

    create or replace procedure avg_grade    ( p_id in number )      cursor c1    select a.id, avg(a.grade) avg_grade    student    inner join     (     select id, subject, max(date) max_date     student     id=p_id     group id, subject    )b on a.id=b.id ,       a.subject=b.subject ,       a.date=b.max_date a.id=p_id group id;  cursor c2 select grade student id=p_id;  declare @out varchar(50) set @out=null  if c2.grade in(5) begin set @out='student failed' end  else if c2.grade not in(5) , c1.avg_grade in (between 1 , 1,5) begin set @out='student has perfect average' end  else  begin set @out='student passed' end  dbms_output.put_line(@out);

please help

select  a.id, avg(a.grade) avg_grade    tablename         inner join         (             select  id, subject, max(date) max_date                tablename               id = 1            -- <<== change p_id             group   id, subject         ) b on  a.id = b.id ,                 a.subject = b.subject ,                 a.date = b.max_date   a.id = 1                      -- <<==  change p_id group   a.id

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