Comments on: How to Create Auto Increment Columns in Oracle

By: Phil

Phil — Thu, 01 Oct 2009 19:16:36 +0000

This is fantastic. Thanks for making it so simple!

By: rainer

rainer — Thu, 01 Oct 2009 12:19:42 +0000

… found a working solution:
String generatedColumns[] = {"ID"}; PreparedStatement st = conn.prepareStatement(sql, generatedColumns);
…
if (st.executeUpdate() != 0) { ResultSet rs = st.getGeneratedKeys(); if (rs.next()) int idValue = rs.getInt(1); }

By: rainer

rainer — Wed, 30 Sep 2009 14:42:32 +0000

this code is just i’ve searched for, thanks.
I need help in getting the generated value using java:

CREATE TABLE person (ID NUMBER(11) NOT NULL, givenName NVARCHAR2(60) default ‘A default value’ NOT NULL, surName NVARCHAR2(60) NOT NULL, CONSTRAINT person_pk PRIMARY KEY ( ID ) ) ORGANIZATION INDEX;

String sql = "insert into person (givenName,surName) values (?,?)"; PreparedStatement st = conn.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS); st.setString(1,"me"); st.setString(2,"fromMars"); st.executeUpdate(); ResultSet rs = st.getGeneratedKeys(); if (rs.next()) { Object obj = rs.getObject(); }

The returned Object is a ROWID, and i’m not able to get the ID for the inserted row.

By: mona

mona — Thu, 04 Jun 2009 17:50:23 +0000

this code works perfectly right up until i delete a row from the table and start adding new rows.. the sequence starts jumping numbers.. help! any suggestions would be appreciated!

By: DebiPrasad

DebiPrasad — Wed, 29 Apr 2009 19:09:17 +0000

in the trigger code whats the meaning of that “dual” word

By: keepitmassive

keepitmassive — Mon, 09 Mar 2009 08:47:56 +0000

Thanks for a great article, that helped me a lot!

By: Vara Prasad

Vara Prasad — Tue, 17 Feb 2009 03:21:12 +0000

good idea…………. Thank u.

By: Jon Emmons

Jon Emmons — Tue, 26 Aug 2008 02:08:17 +0000

If you want to have the same character appear before each sequence number all you need to do is concatenate the letter in the trigger like this:

SELECT ‘A’ || test_sequence.nextval INTO :NEW.ID FROM dual;

If you’re looking to increment the leading letter you’re going to have to get a bit trickier. Maybe others will have ideas, but something like a switch may be in order.

Hope this helps.

By: S.Anugraha

S.Anugraha — Mon, 25 Aug 2008 08:49:56 +0000

hey,wot do i do, if i need to generate a number sequence with character prefixes,say I need to auto increment the column ‘Product_id’ for every product inserted??

By: Kalpesh Suryawanshi

Kalpesh Suryawanshi — Fri, 08 Aug 2008 09:46:50 +0000

Hey, this article is really helpful.