CREATE TRIGGER TRI_NAME_DEL  ON tblStudent 
FOR  DELETE 
AS
DECLARE @towcount int
SET @towcount= COUNT(*) from DELETED 
if @towcount>2
ROLLBACK  TRANSACTION
print 'you cannot delete more than one student at a time!'
END

CREATE TRIGGER TRI_NAME_DEL  ON tblStudent 
FOR  DELETE 
as
begin
DECLARE @towcount int
select @towcount= COUNT(*) from DELETED 
if @towcount>2
begin
  ROLLBACK  TRANSACTION
  print 'you cannot delete more than one student at a time!'
end
END