Query is :
Select id, col2, col3, col4 From TableA

Array should be as below:
(1, 2 are id from TableA)

%arry = (
	1 => {col2=>"abc", col3=>"def",	col4=>"ghi"},
	2 => {col2=>"lmn", col3=>"opq",	col4=>"rst"},
)