title: How to check comma separated value is already exists in SQL column?
body: <p>I have column in table as Deleted_Questions and its values are like
  e.g. -  1,2,4,7,10</p>
  <p>While inserting a new value in this column how we can check string is already exists ,
  In my case I am going to insert string value like '4,' which is already exists in column.</p>