title: Length of a string in PL/SQL
body: <p>Why is this script producing an error? </p>
  
  <pre><code> SET serveroutput ON
    BEGIN
     v_size INTEGER(20);
     v_myName VARCHAR2(50) := 'My name is Ashish Ramtri';
  
     v_size := LENGTH(v_myName);
  
     DBMS_OUTPUT.PUT_LINE(v_size);
  
    END;
    /
  </code></pre>