title: Difference between BYTE and CHAR in column datatypes
body: <p>In Oracle, what is the difference between :</p>
  
  <pre><code>CREATE TABLE CLIENT
  (
   NAME VARCHAR2(11 BYTE),
   ID_CLIENT NUMBER
  )
  </code></pre>
  
  <p>and</p>
  
  <pre><code>CREATE TABLE CLIENT
  (
   NAME VARCHAR2(11 CHAR), -- or even VARCHAR2(11)
   ID_CLIENT NUMBER
  )
  </code></pre>