title: Excel comparing two column value
body: <p>I've a data as below in excel sheet:</p>
  
  <p><img src="https://i.stack.imgur.com/GJ7RB.jpg" alt="enter image description here"></p>
  
  <p>My question is how to write a function that so that a value in column c would check whether the value exist in column a or not, if exist then return Yes else no. Example if I enter A2 in column C, then the excel will return Yes in column D.</p>