title: auto_increment with varchar in oracle
body: <p>i have this table </p>
  
  <pre><code>CREATE TABLE WishList(
      idWishList VARCHAR2(40 BYTE) ,
      WishListName  VARCHAR2(40 CHAR) NOT  NULL,
      id_User  VARCHAR2(40 BYTE) NOT  NULL
  )
  </code></pre>
  
  <p>now how can i use auto_increment with varchar in oracle ??</p>