Creating/Adding Records

Question

I have created a new data base from scratch and when click in the CREATE button...this is the error I'm getting. Please let me know what I need to change
ORA-01400: cannot insert NULL into ("HR"."EMPLOYEES"."EMPLOYEE_ID")
Error Unable to process row of table EMPLOYEES.
OK

Answer 1

because thats field is Primarykey?Give the man a coconut! Primary key columns are mandatory and hence NOT NULL.
auto increment type.Auto increment is MSSQL concept which Oracle does not support in the same way.
You will need to create a SEQUENCE and then build a trigger to populate it....
create sequence emp_seq
create or replace trigger emp_insert before insert on emp for each row
begin
  if :new.employee_id is null then
    select emp_seq.nextval into :new.employee_id from dual;
   end if;
end;
/Cheers, APC