Auto increment numbers in Oracle 8i

Hi all,
How to have an auto increment number as a primary key of a table in Oracel 8i(8.1.7) ?. Is it possible to specify to use a sequence as a column ?
Antony Paul

You can create a BEFORE INSERT trigger that uses the sequence to populate the primary key column. If you are coming from SQL Server, that's the closest approximation to an IDENTITY column.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Similar Messages

How do I select a field and between selected rows insert auto-incremented numbers?

I have a spreadsheet in Numbers '09 and I want to number the rows so that I can sort by the original order after I've already sorted by different items. In Excel this is fairly easy, but how do you do this in Numbers? How do I select a series of rows in a column and tell it to automatically insert numbers incremented from one to the total number of rows?
Thanks,
Philip

Hi Philip,
As an alternative to the method Yvan pointed out, you could use a formula.
(NOTE: This takes longer to write than to do.
(CAUTION: Make sure you use Copy/Paste Values to replace the formulas with the calculated numbers before sorting.))
Choose a column in which to place the numbers.
In the first non-header cell in the column enter the formula:
=ROW()
Select the whole column by clicking its column reference tab.
Then use command-click to deselect the header cells above the one where you placed the formula.
With the cell containing the formula and all of the column below it selected, go:
Insert (menu) > Fill > Fill Down
The formula will be filled into the rest of the column and the numbers calculated.
With the cells still selected, COPY, then go Edit > Paste Values.
This replaces the 'live' formulas with the numbers themselves, and prevents the numbers being recalculated when the rows are sorted.
Regards,
Barry

Auto increment rows in Oracle

Hi..How does one define an autoincrement row in oracle.In SQL Server they use IDENTITY ..
Thanks for the help.

You use a sequence and select the nextval when you do an insert.

Auto Increment column query

I have a very simple table used for debugging:
CREATE TABLE APPS.XX_DEBUG_TMP
TEMP_VALUE VARCHAR2(255 BYTE),
TEMP_DATE   DATE
)Then I can use it to store values as my pl/sql is processed - e.g.:
INSERT INTO XX_DEBUG_TMP (TEMP_VALUE,TEMP_DATE) VALUES ('line 740 l_username value check:' || l_username,SYSDATE); COMMIT;Trouble is that if a load of debug statements get processed with the same timestamp, I can't see which came first.
Can I modify my table creation SQL to include an ID column which just increments for each row that is added to the table?
I'm familiar with how to do it in MySQL (sorry - I know this is an Oracle forum - but am just putting this here to show what I mean):
CREATE TABLE `XX_DEBUG_TMP` (
`TEMP_ID` MEDIUMINT( 10 ) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
`TEMP_VALUE` VARCHAR( 255 ) NOT NULL ,
`TEMP_DATE` DATETIME NOT NULL
) ENGINE = MYISAM ;Is it that simple with Oracle? Probably not!
Any advice much appreciated.
Thanks

There is no auto increment column in Oracle. However, you can create a sequence.
CREATE TABLE APPS.XX_DEBUG_TMP
TEMP_ID     NUMBER NOT NULL PRIMARY KEY,
TEMP_VALUE VARCHAR2(255 BYTE),
TEMP_DATE   DATE
CREATE SEQUENCE APPS.XX_DEBUG_TMP_SEQ;Then in your insert statement do this:
INSERT INTO XX_DEBUG_TMP (TEMP_ID,TEMP_VALUE,TEMP_DATE) VALUES (APPS.XX_DEBUG_TMP_SEQ.NEXTVAL,'line 740 l_username value check:' || l_username,SYSDATE); Another possible solution to your problem would be to use a TIMESTAMP data type instead of a DATE data type. It has fractional second resolution (up to 9 places I believe).

Can we specify prefix for an auto increment column

Hi all,
I want to create an auto increment column in oracle using oracle sequences.
But i want to specify a prefix for the value appearing after increment.
Prefix will remain constant.
If we can how can i do that.
And one more thing is i will call the sequence using a trigger only for a specified condition.My doubt here is can i allow nulls for auto incrementing column
With Regards

<s></s>
-- Samples.
create table tab1
(id varchar2(6) constraint p_tab1 primary key
,data varchar2(255)
create sequence seq_tab1;
create or replace
trigger trg_tab1
before insert on tab1
for each row
declare
p_prefix varchar2(2) := 'AA';
begin
if (:new.id is null) then
select p_prefix||to_char(seq_tab1.nextval,'fm0009') into :new.id from dual;
end if;
end
-- Test
SQL> insert into tab1(data) values('abc');
1 row created.
SQL> insert into tab1(id,data) values('BB9999','xyz');
1 row created.
SQL> select * from tab1;
ID
DATA
AA0001
abc
BB9999
xyz

Auto-increment identity column through procedure in oracle 10g on windows

Hi,
I need identity primary key which should be auto increment before while inserting data into table.
for this i had use sequence and then trigger to increment it.
but now i need to increment it in Procedure, while my procedure is having code to insert data in same table which has primary key

Hi,
SNEHA RK wrote:
Hi,
I need identity primary key which should be auto increment before while inserting data into table.
for this i had use sequence and then trigger to increment it.Right. Some database products have auto-increment columns, and they are really handy. Unfortunately, Oracle does not have auto-increment columns. A sequence is an auto-increment object, and it's the right way to automatically generate unique identifiers, but you need to explicity reference the sequence, either in you DML statements, or in a trigger that will automatically fire before a DML statement.
but now i need to increment it in Procedure, while my procedure is having code to insert data in same table which has primary keyAre you saying that you need to increment the sequence, completely aside from INSERTing into the table?
If so, just reference sequence_name.NEXTVAL wherever you want to. In PL/SQL, you can say
SELECT sequence_name.NEXTVAL
INTO number_variable
FROM dual;This works in any version of Oracle, but starting in Oracle 11, you also have the option of referencing te sequence without using dual, or any other table.
I hope this answers your question.
If not, post a complete script that people can run to re-create the problem and test their ideas.
For example:
-- Here are the table and the seqauence that I created:
CREATE TABLE table_x ...
CREATE SEQUENCE ...
-- Here is the BEFORE INSERT trigger I wrote:
CREATE OR REPLACE TRIGGER ...
-- The trigger works exactly how I want it to in statements like this:
INSERT INTO table_x ...
-- So there are no problems (that I know of) with anything up to this point.
-- Now I want to use the same sequence to ...
-- so that when I execute a statement like this
-- then the next time I add a new row to the orginal table, like this
INSERT INTO table_x ...
-- then the contents of table_x should be ... because ...

How to use "Auto increment" in temp table Oracle

Pleas tell me yaar,
In MS Sql for Auto increment i am using like this "seqid int identity" for temp table
t_seq_tbl table(seqid int identity,EVENT_SEQ_NO varchar(30))
In oracle how to use....

As far as I know there is not any auto increment data type in Oracle. Instead of this you should create a sequence and get the next value of the sequence while creating a row in your table.
CREATE SEQUENCE Test_Sequence ;
CREATE TABLE Test_Table ( Id NUMBER , Foo VARCHAR2(4) ) ;
ALTER TABLE Test_Table ADD CONSTRAINT Test_Table_PK_Id PRIMARY KEY ( Id ) ;
INSERT INTO Test_Table ( Id , Information ) VALUES ( Test_Sequence.NEXTVAL , 'FOO' ) ;

Auto Increment ID Field Table in the Oracle Database (insert new record)

I have been using the MySQL. And the ID field of the database table is AUTO INCREMENT. When I insert a new record into a database table, I can have a statement like:
   public void createThread( String receiver, String sender, String title,
                             String lastPostMemberName, String threadTopic,
                             String threadBody, Timestamp threadCreationDate,
                             Timestamp threadLastPostDate, int threadType,
                             int threadOption, int threadStatus, int threadViewCount,
                             int threadReplyCount, int threadDuration )
                             throws MessageDAOSysExceptionand I do not have to put the ID variable in the above method. The table will give the new record an ID number that is equivalent to the ID number of the last record plus one automatically.
Now, I am inserting a new record into an Oracle database table. I am told that I cannot do what I am used to doing with the MySQL database.
How do I revise the createThread method while I have no idea about what the next sequence number shall be?

I am still very confused; in particular, the Java part. Let me try again.
// This part is for the database table creation
-- Component primary key sequence
CREATE SEQUENCE dhsinfo_page_content_seq
    START WITH 0;
-- Trigger for updating the Component primary key
CREATE OR REPLACE TRIGGER DHSInfoPageContent_INSERT_TRIGGER
    BEFORE INSERT ON DHSInfoPageContent //DHSInfoPageContent is the table name
    FOR EACH ROW WHEN (new.ID IS NULL) // ID is the column name for auto increment
    BEGIN
        SELECT dhsinfo_page_content_seq.Nextval
        INTO :ID
        FROM DUAL;
    END;/I am uncertain what to do with my Java code. (I have been working with the MySQL. Changing to the Oracle makes me very confused.
   public void updateContent( int groupID, String pageName, int componentID,
                              String content, Timestamp contentCreationDate )
                               throws contentDAOSysException
   // The above Java statement does not have a value to insert into the ID column
   // in the DHSInfoPageContent table
      Connection conn = null;
      PreparedStatement stmt = null;
      // what to do with the INSERT INTO below. Note the paramether ID.
      String insertSQL = "INSERT INTO DHSInfoPageContent( ID, GroupID, Name, ComponentID, Content, CreationDate ) VALUES (?, ?, ?, ?, ?, ?)";
      try
         conn = DBConnection.getDBConnection();
         stmt = conn.prepareStatement( insertSQL );
         stmt.setInt( 1, id ); // Is this Java statement redundant?
         stmt.setInt( 2, groupID );
         stmt.setString( 3, pageName );
         stmt.setInt( 4, componentID );
         stmt.setString( 5, content );
         stmt.setTimestamp( 6, contentCreationDate );
         stmt.executeUpdate();
       catch
       finally

Is there a auto-increment data type in Oracle

Is there a auto-increment data type in Oracle ?
How to do it if there is no auto-increment data type in Oracle ?
null

jackie (guest) wrote:
: Is there a auto-increment data type in Oracle ?
: How to do it if there is no auto-increment data type in Oracle
Hi,
I think you need unique ID's, for this purpose you use sequences
in Oracle. Example:
create table xy (
id number,
name varchar2(100)
alter table xy
add constraint xy_pk primary key(id);
create sequence xy_seq start with 1 maxvalue 99999999999;
(there are many other options for create sequence)
create or replace trigger xy_ins_trg
before insert on xy
for each row
begin
select xy_seq.nextval
into :new.id
from dual;
end;
This produces a unique value for the column id at each insert.
Hope this will help.
peter
null

Hibernate data insertion not working with oracle auto increment

hi i have created a table and the id is set to auto increment by a sequence trigger pair
when i manually giving value to id its working fine
but when i tried without maually giving the id i am getting this error
org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): com.pojo.Example
at org.hibernate.id.Assigned.generate(Assigned.java:33)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:99)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at hibernetsample.Main.main(Main.java:30)

>
hi i have created a table and the id is set to auto increment by a sequence trigger pair
when i manually giving value to id its working fine
but when i tried without maually giving the id i am getting this error
org.hibernate.id.Assigned
>
That is because you are using the hibernate 'assigned' generator which, by definition
>
lets the application to assign an identifier to the object before save() is called.
This is the default strategy if no <generator> element is specified.
>
For your use case you can use the 'sequence' generator.
The valid generator options and one way to use a sequence generator is shown in this article
http://www.hibernate-training-guide.com/identifiers-generators.html
The hibernate section of this article also uses a trigger with sequence generator
http://blog.lishman.com/2009/02/auto-generated-primary-keys-in-oracle.html
You should check the hibernate documention and tutorial for examples or search 'hibernate generator sequence example'

JSP - Auto increment Oracle

Hello,
I've created some JSP pages with JDeveloper. When I want to create a new record in a table, then have I to fill in an unique ID for this record. Is it possible to get this field automatically filled in with an unique ID ? With Oracle, it's not possible to have an auto increment field. The solution I know, is to use a sequence and a trigger. But I doesn't want to use a trigger. Is there an other possibility ?
Greetz, Joris

It works! I've created a trigger to call the sequence to the primary key field and now it's populating that column properly.
Just one more doubt about it: I've imported some data from my old Access 2003 database to the new XE database, but when I insert a new record in the table, my sequence doesn't retrieve the last value from the primary key column + 1, it's recording straight from position 1 forward. The sequence created automatically during db migration is this one:
CREATE SEQUENCE "LOG_ID_LOG_SEQ" MINVALUE 1 MAXVALUE 999999999999999999999999 INCREMENT BY 1 START WITH 1 CACHE 20 NOORDER NOCYCLE
The problem with this sequence is that it doesn't see that I've migrated some data to this table before using it, so it's starting with value 1. How can I alter this sequence so it will always get the last (highest) value from my PK column + 1 before interting a new record to the table?
Thanks again!
Regards,
Roger.

How can i create an auto increment column

Hello Everyone
We are working on an EAM package which has an auto number facility but that is not meeting our requirement because some 10s and 100s of numbers keep on jumping based on the number of records the child table has.Means every record in my parent table will have some child records in another table which we call it a child table.The number of numbers that will be jumped each time will depend on the number of child records it has. Now we want to create a new column and generate a sequential unique number in my parent table with out linking it to its child table and use this number as a reference number. And we cant do that through our package customization. Can any one guide us if we can meet our requirement through oracle triggers or so.
Thanks and Regards

Hi,
For "Auto-Increment" functionality - you can use a combination of a sequence and a trigger like so:
create table roles ( role_id INT
                   , role_name VARCHAR2(30) NOT NULL
                   , creation_date DATE DEFAULT SYSDATE NOT NULL
                   , role_description VARCHAR2(255)
                   , CONSTRAINT roles_pk PRIMARY KEY (role_id)
                   , CONSTRAINT roles_uk1 UNIQUE (role_name)
create sequence role_id_seq
start with 1
increment by 1
nocache;
CREATE OR REPLACE TRIGGER roles_pk_trig
BEFORE
insert on roles
for each row
begin
IF :new.role_id IS NULL THEN
   SELECT role_id_seq.NEXTVAL
   INTO :new.role_id
   FROM dual;
END IF;
end;
/Now any insert which leaves the "ROLE_ID" column NULL will have an auto-incremented value put in for that column. This is similar to an "Autonumber" column in Access.
Hope this helps...
Take care.

Auto Increment column in database table

Hello experts, I am using oracle 11g database at windows 7.I have to create a sequence object and a table with an auto increment ID column.For this I have created a trigger before insert to select next sequence from a sequence object. It works well but Now I have the current sequence is 7 and there are 6 records inserted in table. Now I delete two records.Thus I have only 5 records in table but my current sequence is still 7.So if I put it in id column then a new record will be inserted in table with 7 ID number after 5th ID number.I want this record should be inserted with 6 Id number. For this I tried to not use sequence object.I tried a pl/sql trigger before insert, which will count the all records in table and after increment i put it in ID column to insertion....Is this a professional way..? thank You regards aaditya

979801 wrote:
Hello experts, I am using oracle 11g database at windows 7.I have to create a sequence object and a table with an auto increment ID column.For this I have created a trigger before insert to select next sequence from a sequence object. It works well but Now I have the current sequence is 7 and there are 6 records inserted in table. Now I delete two records.Thus I have only 5 records in table but my current sequence is still 7.So if I put it in id column then a new record will be inserted in table with 7 ID number after 5th ID number.I want this record should be inserted with 6 Id number. For this I tried to not use sequence object.I tried a pl/sql trigger before insert, which will count the all records in table and after increment i put it in ID column to insertion....Is this a professional way..? thank You regards aaditya
Sequences only guarantee unique numbers. You cannot (and should not) attempt to create gapless sesquences. That's not how oracle works and will not scale to a multi user application.
Imagine two people try to insert records at the same time (and have yet to commit), the trigger you create will count the number of records and determine there are 5 records, so assign the next number of 6, for both people who are inserting records. The first person to commit will get their data saved, and assuming you have a unique constriaint on that id, the second person will raise a duplicate key on insert or suchlike error.
Gapless sequential numbers are not appropriate to multi-user environments. Such requirements are often given by managers or business people who do not understand the technology.
Think of it in terms of a real world office, but with people using a paper system instead of a computer. The only way you can try to guarantee people get the next number and also re-use numbers that have been deleted is to have a single place where each person in the office goes to, to fetch the next number, and they have to queue up behind each other to get the next one off the list. But if someone has removed an old record, they've got to wait in the same queue to go and put that number back in the pot for someone else to use. It just doesn't work, even in a manual system. Yes, people can guarantee that they're only getting unique numbers that nobody else is using, but they cannot guarantee that they are reusing and filling gaps etc. It's an unrealistic expectation.

How to use auto-increment and search option for MS Access DB

Dear All,
I have configured our invoice in Adobe Livecycle and connected it to MS Acess 2007 as per http://forms.stefcameron.com/2006/09/18/connecting-a-form-to-a-database/.
All is working fine, I can insert, retrieve data from DB to invoice and vice versa.
Now I want few things to be implemented on our invoice.
When ever I open our invoice, it populate the first entry from DB, Is it possible to populate the last entry ?
Auto increment invoice number from MS Access DB every time we open our invoice after save.
How to implement search option from DB for invoice number ?
Please let me know if someone can provide me help on my scenario, so that I can share more stuff related to invoice and DB.
Look forward to hearing soon from experts and other team members.
Thanks & Regards
Riyad...

As far as I know there is not any auto increment data type in Oracle. Instead of this you should create a sequence and get the next value of the sequence while creating a row in your table.
CREATE SEQUENCE Test_Sequence ;
CREATE TABLE Test_Table ( Id NUMBER , Foo VARCHAR2(4) ) ;
ALTER TABLE Test_Table ADD CONSTRAINT Test_Table_PK_Id PRIMARY KEY ( Id ) ;
INSERT INTO Test_Table ( Id , Information ) VALUES ( Test_Sequence.NEXTVAL , 'FOO' ) ;

Auto-increment column increase performance in this case ?

hi.
i have the following facts to construct a set of tables.
1. A Lecturer has an ID, Name and Date Joined
2. A Classroom has an ID, Number Of Students
3. A Lecturer can Teach in Many Classes
4. A Class Can be lectured by Many Lecturers
5. Each Lecture Date should be Stored in the DB.
considering those facts, the following schema can be derived
Lecturer
(Lecturer_ID (PK), Lecturer_name, Date_Joined)
Classroom
(Classroom_ID (PK), NumOfStudents)
Class_Lectures
(Classroom_ID, Lecturer_ID (Composte PK), LectureDate)
this is the normal practice we do.
but what if the 3rd Table is constructed as follows ?
Class_Lectures
(LectureSeriesID (Auto-Increment, PK), Classroom_ID, Lecturer_ID (Composte Unique Key), LectureDate)
if the 3rd Table is created as above, will there be any performance differences ? will the performance improve or get reduced ? any advantages / disadvantages of having that structure ?
please do advise my any further best practices as well.
Thanks and Regards

http://technet.oracle.com:89/ubb/Forum88/HTML/000944.html
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Auto increment numbers in Oracle 8i

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