How to read all the cells from a sap.m.Table in SAP UI5

Steps involved in determining the total line items of a sap.m.Table

  1. get the sap.m.Table instance
  2. call the getItems() method of the sap.m.Table instance
  3. Loop through the records. For each row, get the mAggregations of the line item and then get the text property by accessing the cells of the item.
Line Items and Cells under the sap.m.Table

Main Code Below:
var tableItems = mTable.getItems();
document.write("Total no of items:", tableItems.length);
for(iRow = 0; iRow < tableItems.length; iRow++)
  {
    document.write("<br>");
    document.write(tableItems[iRow].mAggregations.cells[0].mProperties.text);
    document.write(",",tableItems[iRow].mAggregations.cells[1].mProperties.text)
    document.write(",",tableItems[iRow].mAggregations.cells[2].mProperties.text);
  }

Full code: Please run it in https://jsbin.com/?html,output
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="Sap m Table">
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>SAP M TABLE</title>
  
  <script id='sap-ui-bootstrap' type='text/javascript'
            src='https://sapui5.hana.ondemand.com/resources/sap-ui-core.js'
            data-sap-ui-theme='sap_bluecrystal'
            data-sap-ui-libs='sap.m,sap.ui.table'
            data-sap-ui-compatVersion='edge'></script>
  
            <script type='text/javascript'>

var jsonData = [ {columnOne : "Data row A1", columnTwo : "Data row 100", columnThree : "Data row hundred"},

                 {columnOne : "Data row A2", columnTwo : "Data row 200", columnThree : "Data row two hundred"},

                 {columnOne : "Data row A3", columnTwo : "Data row 300", columnThree : "Data row three hundred"}  ];

var jsonModel = new sap.ui.model.json.JSONModel(jsonData);

var  mTable  =  new sap.m.Table({

                columns : [

                      new sap.m.Column({ header  :  new sap.m.Label({  text : "Column One" }) }),

                      new sap.m.Column({ header  :  new sap.m.Label({  text : "Column Two" }) }),

                      new sap.m.Column({ header  :  new sap.m.Label({  text :  "Column Three" }) })

  ]

}).placeAt("content");

mTable.setModel(jsonModel);

mTable.bindAggregation("items", {

path  :   "/",

template  :  new sap.m.ColumnListItem({

cells : [

new sap.m.Text({ text : "{columnOne}"  }),

new sap.m.Text({ text :  "{columnTwo}" }),

new sap.m.Text({ text :  "{columnThree}" }),

]

})

});
var tableItems = mTable.getItems();
document.write("Total no of items:", tableItems.length);
for(iRow = 0; iRow < tableItems.length; iRow++)
  {
    document.write("<br>");
    document.write(tableItems[iRow].mAggregations.cells[0].mProperties.text);
    document.write(",",tableItems[iRow].mAggregations.cells[1].mProperties.text)
    document.write(",",tableItems[iRow].mAggregations.cells[2].mProperties.text);
  }
</script>
              
</head>
<body class='sapUiBody'>
    <div id='content'></div>
</body>
</html>