title: NUMBER(12,0)'s meaning in "S_NO NUMBER(12,0) NOT NULL ENABLE PRIMARY KEY"
body: <p>Can anyone clarify what datatype <code>NUMBER(12,0)</code> means in <code>S_NO NUMBER(12,0) NOT NULL ENABLE PRIMARY KEY</code>?</p>
  
  <p>Please clarify each parameter (i.e. <code>12,0</code>).</p>