Comments on: Creating BETTER auto-increment columns in Oracle

By: siddharth sinha

siddharth sinha — Wed, 01 Feb 2012 08:32:10 +0000

there is better option then creatin a trigger

SQL> insert into example (id, name) values (example_id_seq.nextval, ‘Earl111′);
1 row created.

here we are not suppore to use trigger. nextval will take care fo the same.

By: justus the octopus

justus the octopus — Sat, 26 Nov 2011 09:26:22 +0000

im so grateful for this post i had this problem for 3 good days. when the autonumber column is a string then its a problem if the table has no data but it works well when its a number.

By: Bryan Klumpp

Bryan Klumpp — Fri, 21 Oct 2011 05:05:18 +0000

I was having the same problem as mona with Oracle 10g XE. However I’m not sure it is a XE-specific issue. I suspect it is related to the JDBC driver not handling the semicolons properly; it looks like it is trying to process it as multiple SQL statements. My guess is that mona was trying to run in a JDBC-based tool like DB Visualizer or SQL Developer. There may be a way to properly escape the semicolons but I gave up looking for it and found an easier way: try executing from SQL Plus, it worked for me.

By: Creating auto-incremented PK column in Oracle as we know it from SQL Server « Jacek Spólnik's blog

Sat, 17 Sep 2011 09:27:06 +0000

[...] can’t be complicated task. But Oracle suprised me again, so I looked for some solution. The post, which I found, describes how to do that in very clever way. And now, everything is simpler [...]

By: Earl Ruby

Earl Ruby — Wed, 03 Aug 2011 18:27:29 +0000

Michele:

If you’re worried about performance test it and see. Try inserting a million records into a database using the method1 trigger, then try it again with the method2 trigger. Time the results.

Let us know what you find.

By: Michele

Michele — Tue, 26 Jul 2011 11:26:02 +0000

thx for the article!

Performance of Method2 is the same of Method1?

By: Mariyappan.C

Mariyappan.C — Fri, 20 May 2011 05:43:12 +0000

Auto increment of the column in 11G without any trigger only applicable in 11g

CREATE SEQUENCE “CM_4_0″.”TEST_SEQ” MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 2 START WITH 1000031624 CACHE 20 NOORDER NOCYCLE ;

create or replace function F return number as
a number;
begin return
select TEST_SEQ.NEXTVAL into a from DUAL;
return a;
end;

drop table Z

create table Z( name varchar2(10), PRI number generated always as(f()) VIRTUAL );

insert into z(name)values(‘asasa’);
insert into Z(name)values(‘asasa’);
insert into z(name)values(‘asasa’);
insert into z(name)values(‘asasa’);

commit;

By: Sweetie Bracelet

Sweetie Bracelet — Mon, 07 Feb 2011 05:38:12 +0000

,-~ thank you for posting a topic about this stuff, i was looking for it. ,-*

By: Kunal

Kunal — Sun, 09 Jan 2011 12:53:14 +0000

Very simple and crisply written article on using Triggers and Sequences !

By: My Readings This Week – Ganda Manurung

My Readings This Week – Ganda Manurung — Thu, 09 Dec 2010 07:50:39 +0000

[...] Creating Auto-Increment Columns in Oracle. The alternatives article. [...]