use oracle sql command line with found or notfound method

---

with table

Customer(customerNo,costomerName

,gender)

Employee (employeeNo,employeeName,job) ,branch(No,Name),

category(catNo,catogeryName)

--

with trigger like this one it may has some errors

--

create or replace

trigger increment_id

before insert on table_name

for each row

Begin

select max(table_id)+1 into :new.table_id from table_name;

End ;

--

4) Create database package pointOfSal which contain the following A. procedure to add new customer which use validation method checkExistingCustomer using cursor to validate customer name if its not exists before, then add this new customer and generate the customer number automatically using database trigger. B. Method to add new Employee which use validation method checkExistingEmployee using cursor to validate Employee name if its not exists before, then add this Employee and generate the Employee number automatically using database trigger. C. procedure to add new Category which use validation method checkExistingCategory using exception to validate category name if its not exists before, then add this category and generate the category number automatically using database trigger