title: How to restrict the length of INTEGER when creating a table in ORACLE?
body: <p>all</p>
  
  <p>When creating a table in Oracle sql*plus, I want to restrict that the length of an INTEGER column can <strong>only be 8</strong>.</p>
  
  <p>eg: the RegNumber is an INTEGER, and it must be a 8 digit number.</p>
  
  <p>How can I do this when I creating a table?</p>