Solved

what is the best solution for primary key

Posted on 2014-09-21
4
276 Views
Last Modified: 2014-09-23
hi
i'm using oracle forms , when i have in my database tables having primary key , number , should have incremental value by 1 record by record
when i have in a form : header & tabular blocks  based on main & sub tables
think now i'm in the header block , while inserting new record , what is the best trigger to use to set new value for the record ID , then so on for the tabular block ?
0
Comment
Question by:NiceMan331
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 11

Expert Comment

by:Radek Baranowski
ID: 40336202
IDENTITY column is now available on Oracle 12c version, see this:

CREATE TABLE t1 (c1 NUMBER GENERATED BY DEFAULT ON NULL AS IDENTITY, 
                   c2 VARCHAR2(10));

Open in new window

0
 

Author Comment

by:NiceMan331
ID: 40336315
i'm working on oracle 10g database , 6i developer
0
 
LVL 35

Accepted Solution

by:
Mark Geerlings earned 500 total points
ID: 40336412
Don't use a database trigger to provide the primary key value.  That can cause problems in Oracle Forms:  the users will get "record updated by another user" message if they ever try to change a record that was just inserted.  Use a pre-insert trigger in the header block to retrieve the next sequence value for the header record.  Use a pre-insert trigger in each child or detail block to retrieve the next sequence value for the primary key in each of those blocks.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article started out as an Experts-Exchange question, which then grew into a quick tip to go along with an IOUG presentation for the Collaborate confernce and then later grew again into a full blown article with expanded functionality and legacy…
Cursors in Oracle: A cursor is used to process individual rows returned by database system for a query. In oracle every SQL statement executed by the oracle server has a private area. This area contains information about the SQL statement and the…
This video shows how to Export data from an Oracle database using the Datapump Export Utility.  The corresponding Datapump Import utility is also discussed and demonstrated.
This video shows how to recover a database from a user managed backup

729 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question