jQuery: How to select the values from the table's column based on tables header only

Question

I have a table with header ID. I need to select all the fields under this header. I don't have access to the source code and no classes are used in this table. Any idea on how to get this done?

Answer 1

To get the first column:

$(function() {
   var col = $("td:nth-child(1)");
});