Finding Id inside of table using Jquery mvc

Question

 <tbody id="tby_column">
lt;td> <select class="form-control" id="QueryColumnList[1].Columns" required="" data-msg="Select the Column"> <option value="">Select a Column </option> </select> </td>
</tbody>

About the table,

 

How to find  id- QueryColumnList[1].Columns   ?

 

i tried below Jquery code:

var compiled = $('#tpl_Column').tmpl(data).html();
         $('#tby_column').append(compiled);
         alert($('#tby_column').html());

         var ddlId = "#QueryColumnList[" + rowid + "].Columns";
         alert(ddlId);
         var ddl = $('#tby_column').find(ddlId).length;

         alert(ddl);