title: Questions on Cassandra data types
body: <p>I am new to cassandra and would like to know about the following:</p>
  
  <ol>
  <li>How do I set a default value for a column.</li>
  <li>How do I define a char data type or at least define a size for varchar something like varchar(100) in mysql.</li>
  <li>how do I specify if a column can have null values or not.</li>
  <li>How auto-increment feature can be done.</li>
  </ol>
  
  <p>Thanks.</p>