I am seeking help regarding c# and access database

I have tried a query to search but it dint work out.

If u may kindly give me a simple example???

Can anyone also help in improving this code.
clc
a1=[1 -1 1 -1 0 1 1 -1 1 -1 0 1 1 -1 1 -1];
a2=[1 -1 1 -1 1 1 1 -1 1 -1 0 1 1 -1 -1 -1];
a=[a1;a2];
[x,y]=size(a);
b=input('Enter:');
[l,m]=size(b);
count=0;
if(y==m)
for i = 1:x
for j = 1:y
if(b(j)==a(j))
count=count+1;
per=(count*100)/y;
end
if(per<81.25)
i = i+1;
end
end
end
if(per==100||per==93.75||per==87.5||per==81.25)
disp('Vector matched');
else
disp('Not matched')
end
else
disp('Execute program again');

end

The problem is its only checking the first vector not the rest so can anyone help with this, its in matlab.