I need to convert html table data to excel format

in Web application i have a table with 4 columns those are

1.College code
2.1st year
3.2nd year
4.3rd year
again in 1st,2nd,3rd years i have 3 columns in each column those are 
a) Admitted
b) Registered
c) Conformed

The data it should come from sql database of combining of 2 or 3 tables

 So now i want college code wise and year wise no.of admitted , registered ,conformed students


with paging option and at the same time i want to convert total data into excel format after getting results when click export to excel button

example like this

College code	1st year	2nd Year	3rd year
	Admitted Registered Conformed	admit Regist Conform	Admt Reg Conf

First

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                                               Export to excel