title: like with nvarchar is not working correctly?
body: <p>Using Microsoft SQL Server 2012 - 11.0.5058.0 (X64) Express Edition (64-bit) on Windows NT 6.1  (Build 7601: Service Pack 1) (Hypervisor) </p>
  
  <p>with that creation/fill script :</p>
  
  <pre><code>CREATE TABLE tbl (col CHAR (32) )
  insert into tbl values ('test')
  </code></pre>
  
  <p>Those kind of statements :</p>
  
  <pre><code>declare @var varchar(32) = 'test'
  delete from tbl where col like @var
  </code></pre>
  
  <p>or</p>
  
  <pre><code>delete from tbl where col like 'test'
  </code></pre>
  
  <p>actually delete the line but why this one :</p>
  
  <pre><code>declare @nvar nvarchar(32) = 'test'
  delete from tbl where col like @nvar
  </code></pre>
  
  <p>do not delete the line ?</p>