What is JQuery

 JQuery is a light weight, write less, do more javascript library.

Table tag in HTML

 <table border="1">

</table>

Marquee tag in HTML

 <div style="height: 500px">

    <marquee height="500" direction="down">

        Test

    </marquee>

</div>

Table data nth hide column

 <style>

    td: nth-child(2)---------------- column second

    {

        display: none

    }

</style>

reference:- www.w3schools.com/cssref

Table Data nth background color

 <style>

    td: nth-child(2)------------------column second

    {background-color: red;}

</style>

reference:- w3schools.com/cssref/