title: How to alter user defined table types
body: <p>I have already tried to alter the user defined table types but it is not working with alter commend.</p>
  
  <pre><code>alter TYPE [dbo].[GriDDateTab] AS TABLE(
      [Application [varchar](50) NOT NULL,
      [LandDist] [char](2) NULL,
      [Land] [char](3) NULL,
      [LandVi] [char](4) NULL)
  </code></pre>