sql query to delete and return message

Question

I want to write some thing like that query.

BEGIN

DECLARE @Unaloacte int;
DECLARE @Total int; 
DECLARE @Flag int;

 SET @Unaloacte =( Select count(PD.PropertyDetailId)
      from PropertyDetail AS PD join  SiteDetail AS SD ON PD.SiteDetailId=SD.SiteDetailId 
      Where PD.CustomerId<1 and PD.SiteDetailId=27);

 SET @Total= (Select count(PropertyDetailId) as Total_Count from PropertyDetail
     where SiteDetailId=27) ; 
 
if( @Unaloacte = @Total)

    Delete something and display message print"Delete";

 else 

 print"Not able to delete" 
 END

I hope you understand my problem.......!!!