title: Autoincrement of table id using string combination in database automatically
body: <p>We know that id of any table is of integer type and auto-increment in that table is fine. But my problem is that i want to increment a combination of string and integer. For example
  String : ABC is the starting code for the unique id.</p>
  
  <p>First Id of my table should be primary key and </p>
  
  <p>ie ABC10001, ABC10002,..... and so on.</p>
  
  <p>Without using another key as auto-increment. Please do not use two type of unique key.</p>