Problem in the constraints

Question

Hi friends,
I have a scenario in the sense, i'm a Apex Developer.......Im developing an database application in apex by using two tables..........
One table is the one that im taking from my production instance, in my scenario i have taken the table from the HRMS.......The table name is
*) per_all_people_f
Other table is the one that im creating in the customly in apex itself, the table name is
*) xx_l_org_emp_details
Since the Apex and the production instance are of in the different server, so what i did inorder to access my production table to apex means, in the sense i created a db link between the two server and through this db link i have taken the production table in the apex........
so, according to my scenario i need to build the application using these both tables, that is the table from production instance and the table that i creating in the apex.......
According to my scenario, i shouldnot make any DML operations in the production instance table due to the security purpose.....What all i need to do is just fetch the datas from it, inorder to use it in the application.....But i can perform the DML operations in my custom table that i created in the apex(xx_l_org_emp_details).......
So inorder to use the two tables in my application i need to join the two tables,
For that in the table*"per_all_people_f"* person_id, is the primary key column...So what i did is i created a some of the columns in the custom table along with person_id in it inorder to give join between the two.....
Okay by using the two tables i have created the application......This is what the steps so far i have done.........
My problem comes over here......Since the name of the application that i was developing is the salary certificate....
So, a single person can raise more than twice or thrice the salary certificate according to his need........And all these details will be stored in the custom table xx_l_org_emp_details only...
But my problem is a single person cannot raise more than one salary certifcate request, because i have taken"person_id" as a primary key column which is unique constraint and it will not allow duplicate values.....
At that time, what i did is i disabled the unique constraint in the table and i started to insert more than three salary request by a single person........Hence all the three records raised by a single person is inserted in my custom table as i disabled the constraint.....( If the constraint is enabled means i cannot insert more than one that's why i disabled it )....
But incase, if i want to update any three of the request raised by the single person means, i need to update it......But it is not allowing me to update as it is throwing error like
>ORA-01422: exact fetch returns more than requested number ...
I know that this error will occur, as it doesnt know which record it needs to take inorder to update that's why it is throwing the above error.......
But according to my scenario i need to update all the three records raised by the single person, and also he can apply more than 3 request by himself...for this case what can i do.......Any idea friends....
Help me to achieve this........
Thanks,
GTA...

Answer 1

Are you using an update for this? Or a merge?
Please post the statement.
An update statement updates both the rows for a given person_id with the same value.
SQL> CREATE TABLE UPDTEST
  2  AS
  3         SELECT 1 PERSON_ID, LEVEL * 10 SAL
  4           FROM DUAL
  5     CONNECT BY LEVEL < 3;
Table created.
SQL> SELECT * FROM UPDTEST;
PERSON_ID        SAL
         1         10
         1         20
2 rows selected.
SQL>  UPDATE UPDTEST SET SAL=100 WHERE PERSON_ID=1;
2 rows updated.
SQL> SELECT * FROM UPDTEST;
PERSON_ID        SAL
         1        100
         1        100
2 rows selected.
SQL>