Need to show the custom list item in HTML table in sharepoint

$(document).ready(function() {  


loadMyItems();
    
})


function loadMyItems() {  
    var siteUrl = _spPageContextInfo.siteAbsoluteUrl;  
    alert(siteUrl);
    var oDataUrl = siteUrl + "/_api/web/lists/getbytitle('Purchase Order')/items?$select=PO_x0020_ID";  
    $.ajax({  
        url: oDataUrl,  
        type: "GET",  
        dataType: "json",  
        headers: {  
            "accept": "application/json;odata=verbose"  
        },  
        success: mySuccHandler,  
        error: myErrHandler  
    });  
}  
function mySuccHandler(data){

 try{  
        var dataTableExample = $('#table_id').DataTable();  
        if (dataTableExample != 'undefined') {  
            dataTableExample.destroy();  
        } 
        
        
        dataTableExample = $('#table_id').DataTable({  
            scrollY: 300,  
            "aaData": data.d.results,  
            "aoColumns": [{  
                "mData": "PO_x0020_ID"  
               
            }]  
        });
             
        }
        catch (e){
        alert ("e.message");
        }
        }
        
  
function myErrHandler(data ,errCode, errMessage) {  
    alert("Error: " + errMessage);  
}