Hi Velu,
Use the below code:
var myTable = app.activeDocument.stories.everyItem().tables.everyItem().getElements();
alert(myTable.length)
for(i=0; i<myTable.length; i++)
{ myTable[i].columns[0].select(); app.selection[0].cells.everyItem().texts[0].appliedParagraphStyle = "ccc"; alert("yes") }
Regards
Siraj