title: How to assign unique starting value to Identity Column's starting value [SQL Server 2014]
body: <p>For example, I have UserId column which is identity column of my table. 
  When I add new data to table, UserId assign 1 automatically. If enter new data, the number in the column increases one by one.</p>
  
  <pre><code>UserId - UserName - UserLastName
  1        asd        asd
  2        xyz        xyz
  </code></pre>
  
  <p>I want to change UserId's starting value and increase it by my condition.</p>
  
  <pre><code>UserId - UserName - UserLastName
  US1        asd        asd
  US2        xyz        xyz
  </code></pre>
  
  <p>Is it possible to increase string values like above ?</p>