Declare @Str varchar(60)
Select @str='Ana lleva al oso la avellana'
Select
case when reverse(substring(replace(@str, ' ',''),(len(replace(@str, ' ',''))/2)+2,(len(replace(@str, ' ',''))/2)+1))=substring(replace(@str, ' ',''),1,(len(replace(@str, ' ',''))/2)) then 1 else 0 end EsPali