<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">

<div class="container">
  <div class="row mx-n1">
    <div class="col-12 col-md-6 px-1">
    text
    </div>
    <div class="col-12 col-md-6 px-1">
    text
    </div>
  </div>
</div>

div[class*='col-'] {
  border-left: 1px solid red;
}

div[class*='col-']:last-of-type {
  border-right: 1px solid red;
}