Creating the HT_EMP Table

Question

I have attempted to run the code below, but I keep gettting errors. This code was cut and pasted from pages 5-2 and 5-3, the Oracle Application Express Advanced Tutorials version 3.1.2 E10497-02. What corrections
do you suggest, and would Oracle have correct copies of this code?. You are told to copy and enter the code, so that you might have a working example of how to create a new table by running a script in
SQL Scripts using data defintion language (DDL). Also, Does anyone know who I could contact at Oracle concerning obtaining a correct copy of the code below?
CREATE TABLE ht_emp (
emp_id NUMBER primary key,
emp_first_name VARCHAR2(30) not null,
emp_middle_initial VARCHAR2(1),
emp_last_name VARCHAR2(45) not null,
emp_part_or_full_time VARCHAR2(1) not null check (emp_part_or_full_time in
('P','F')),
emp_salary NUMBER,
emp_dept VARCHAR2(20) check (emp_dept in
('SALES','ACCOUNTING',
'MANUFACTURING','HR')),
emp_hiredate DATE,
emp_manager NUMBER references ht_emp,
emp_special_info VARCHAR2(2000),
emp_telecommute VARCHAR2(1) check (emp_telecommute in ('Y')),
rec_create_date DATE not null,
rec_update_date date)
INSERT INTO ht_emp
(emp_id, emp_first_name, emp_middle_initial, emp_last_name, emp_part_or_
full_time, emp_salary, emp_dept, emp_hiredate, emp_manager, emp_special_info,
emp_telecommute, rec_create_date)
VALUES
(1,'Scott','R','Tiger','F',
100000,'SALES',sysdate,null,'cell phone number is xxx.xxx.xxxx
home phone is yyy.yyy.yyyy','Y',
SYSDATE)
CREATE SEQUENCE ht_emp_seq
start with 2
CREATE OR REPLACE TRIGGER bi_ht_emp
BEFORE INSERT ON ht_emp
FOR EACH ROW
BEGIN
SELECT ht_emp_seq.nextval
INTO :new.emp_id
FROM DUAL;
:new.rec_create_date := SYSDATE;
END;
CREATE OR REPLACE TRIGGER bu_ht_emp
BEFORE UPDATE ON ht_emp
FOR EACH ROW
BEGIN
:new.rec_update_date := SYSDATE;
END;
/

Answer 1

For those of that don't want to run that, what specifically are the errors you are getting? I'm getting errors is not very helpful.