Could you anyone plz send query to solve

Question

Hi
i hav a table name student,three columns math,phys,chem 3 subjects name,
student a,b,c,d,e,f.... ok. here ram,sham,jadu etc.
i need to get those student's name with subject and marks
who have scored height mark with respect to.
i need sql query to find out result
previous one was just hints, according to my requirement
Hint:
answer would be like:
ram phys 80
sham math 85
jadu chem 82
table like:
name phys chem math
ram 80 73 71
sham 75 73 85
jadu 72 82 73
mac 74 78 67
jan 78 56 65
han 56 45 76
Edited by: Sujay S on Oct 10, 2009 12:00 PM

Answer 1

Table: HighestMarks
Stname          Phy     math     Chem
Aseet          50     64     90
Rabi          80     96     34
Pravat          57     95     90
Sankar          80     60     45
Query:
select t1.stname, decode(t2.m_p,t1.phy,'phys',decode(t2.m_c,t1.chem,'chem','math')) subject
,decode(t2.m_p,t1.phy,phy,decode(t2.m_c,t1.chem,chem,math)) marks
from HighestMARKS t1,
select max(phy) m_p, max(chem) m_c, max(math) m_m from HighestMARKS t1
) t2
where t1.phy=t2.m_p
or t1.math = t2.m_m
or t1.chem = t2.m_c
Error:
1.     if a single person secure highest marks in two subjects(Pravat secure highest mark in Math and Chem) then this query shows 2 subjects .It does not show the highest mark in Math
Stname Subjects Marks
Aseet     chem     90
Rabi     phys     80
Pravat     chem     90
Sankar     phys     80
But if 2 person secures same highest mark then this query returns results.
Edited by: Sujay S on Oct 10, 2009 3:04 PM