title: Casting Varchar to fixed length
body: <p>Is there any issue with the following SQL? Here no length has been used while converting to varchar.</p>
  
  <pre><code>SELECT CAST('abc' AS varchar)
  </code></pre>
  
  <p>Should I use </p>
  
  <pre><code> SELECT CAST('abc' AS varchar(3))
  </code></pre>