title: Conversion failed when converting the varchar value '23/05/1994' to data type int
body: <pre><code>declare @DOB int
  declare @age int
  select @DOB=coalesce(@DOB+'23/05/1994','')
  set @age=DATEDIFF(YEAR,@DOB,GETDATE())
  
  select @age
  
  (or)
  
  select DATEDIFF(MONTH,'23/05/1994','23/06/1995')
  </code></pre>
  
  <p>The conversion failed while converting the varchar value <code>'23/05/1994'</code> to data type <code>int</code>.</p>
  
  <p>I am getting this response when executing the above queries, help me out please.</p>