Two column primary keys

Question

Hello,
I am using two columns for my primary key. However when I crate a report and form pages, it doesn't work. The report page shows up but when I click on the edit icon next to each record it gives an error message.

Answer 1

Zahid Khan wrote:
Hi User (very common name!),
In the following simple page I am using empno and hiredate columns as primary key:
http://apex.oracle.com/pls/otn/f?p=9396:10
It would be easier to help you if you set up an example on OTN.
Thanks,
ZahidDear Zahid,
I looked at the application example you provided and the way the trigger ensures the trunc function is called on the date field before writing it to the db table, so the date retrieved from the db looks exactly the same as the date inserted.
CREATE TABLE "EMP_DATE_KEY"
(     "EMPNO" NUMBER,
     "ENAME" VARCHAR2(10),
     "HIREDATE" DATE,
     "SAL" NUMBER,
     "DEPTNO" NUMBER,
     CONSTRAINT "PK_EMP_DATE_KEY" PRIMARY KEY ("EMPNO", "HIREDATE") ENABLE
CREATE OR REPLACE TRIGGER "BIUD_EMP_DATE_KEYS"
before insert on emp_date_key
for each row
begin
select nvl(max(empno),0)+1, trunc(sysdate)
into :new.empno, :new.hiredate from emp_date_key;
end;
ALTER TRIGGER "BIUD_EMP_DATE_KEYS" ENABLE
Line: --------
However the database I am dealing with has not used the trunc function when creating the date field values and the primary key, by the way this db is very old and has a lot of data in it.
any suggestions?
Thanks,
user