title: Creating key in Teradata
body: <p>So as I was exploring Teradata more , I come up with a problem.
  that is how to create surrogate keys fast and efficiently,</p>
  
  <ul>
  <li>using ETL tools like Informatica has limitation up to which it can generate keys like Sequence Generator can create up to 2 billion only, what after that ?</li>
  <li>Teradata has a facility of identity columns which can be used instead but will it not hamper parallelism like will it not insert data 1 row at a time and wait for the value of identity column to increment before inserting another row.
  if this is the case what one should do to handle this so that billions of rows can be inserted with a high performance.</li>
  </ul>
  
  <p>Please help me if I am wrong , am new for this big technology of Teratada.</p>
  
  <p>Thanks.</p>