How to: Fixed Table Header with ONE table (no jQuery)

Question

I know, there are at least 3 dozen questions like this on stackoverflow and still, I could not make this happen:

A simple table where thead is sticked/fixed at the t

Answer 1

Maybe we should change a method to archieve this goal.Such as:

1
2
 //make it fixed

    

        
1
2
    
    

    

Of course, this is not good to sematic.But it is the simplest way without js or jq. Don't you think so?