Auto increment row no. of a datatable

I want the first column of a datatable to show the serial no. of each row, like 1, 2, 3... with the column header "Id". Is there any way to implement this without modifying my bean? Is there any mechanism which has implemneted the auto increment function?

Access the datamodel and do that

Similar Messages

  • 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.

  • Retrieve new row's auto-increment key from dataprovider

    ** cross posted on SDN JSC Forum and Netbeans J2EE Nabble forum **
    I have a page that is bound to a MySQL table rowset or, alternately, a new (append()'ed) row. The row's Primary Key is a MySQL auto-increment Integer (translates to a Long.) After commit()'ing the the new row to the database, how would I then get the new row's ID (fieldname "ID")? If I refresh() the dataprovider and try to get the value an error is thrown.
    Some background: The dataprovider's backing rowset has a query parameter for the ID field. I set it to "0" if the page is creating a new row or I set it to the unique ID if the page is displaying an existing row. After the new row is committed, I need the new ID set the query parameter and synch up related rows in different tables that are keyed off the ID in this (master) table. I'd like to do this without "guessing" what the ID would be in advance as that method isn't foolproof in heavy usage.
    Additionally, it strikes me as a useful workaround if the unique ID was a UUID (mySQL UUID() function) that does not run the risk of any concurrency issues. Has anyone used this solution in VWP? How would I make the call for the underying DB (in this case MySQL, but could be anything) to generate the UUID? Is the call DB specific or is there a JDBC equivalent?
    UPDATE: never mind the GUID question, I can use the java.rmi.dgc.VMID class to autogenerate unique GUID's for this purpose. Being from a Lotus Notes background, I'm used to the power and flexibility such Unique ID's bring to the app. dev's portfolio.
    Thanks in adv. for any help .
    -Jake
    Message was edited by:
    jakeochs

    JSF together with JBoss Seam offers some real good possibilities to improve developer productivity. Right now, with JSF you can create forms where fields are persistent (saved in a database), but you have to write code to persist fields. In Notes/Domino, every field you drop in the form is automatically set to persist without writing a single piece of code. JBoss Seam aims to provide the missing glue to tie the JSF beans with business logic (EJB) and persistent layer (JPA). I think tools for Seam are still not mature. I would love to see JSC/VWB utilizing Seam. I know there is a NetBean plugin for Seam but it was written for old NetBeans (not VWP or JSC), so it doesn't work with the visual web pack where you can drag and drop JSF components.

  • LINQ: Update a column with auto increment value

    Hi All,
    Greetings.
    I am very new to C# (though with lot of experience in VC++). Now a days, I am engaged in a C# project where I need to deal with ADO.NET DataTable and related classes. I am stuck up in a scenario as follows:
    I have a data table (of DataTable type) pre-populated with many rows (50000+), parsed from a log file. Now I need to add a column that will be holding index number for each records; eg. 1, 2, 3......
    I have tried to add the auto-incremented column dynamically, with seed = 0 and increment = 1, but it is not working.
    Is there any LINQ query that I can run to update the DataTable at once? Or foreach loop per DataRow is the only option here?
    I appreciate any quick suggestion on this.
    Thanks in advance.
    Sanjoy Jana.

    You should add the auto increment column to the DataTable before you pouplate it with the other data:
    //1. Create a datatable
    DataTable dt = new DataTable();
    //2. add the autoincrement column:
    DataColumn column = new DataColumn();
    column.DataType = System.Type.GetType("System.Int32");
    column.AutoIncrement = true;
    column.AutoIncrementStep = 1;
    column.AutoIncrementSeed = 1;
    //3. Fill the dataTable using an SqlDataAdapter or whatever
    dt.Columns.Add(new DataColumn("name"));
    dt.Rows.Add("1");
    dt.Rows.Add("2");
    dt.Rows.Add("3");
    dt.Rows.Add("4");
    Then you don't have to add the "auto incremented" values yourself in some kind of a loop (using for example LINQ or foreach).
    If you want to know how to poplulate the DataTable from a database query using an adapter, please refer to the following page:
    http://www.dotnetperls.com/sqldataadapter
    Hope that helps.
    Please remember to mark helpful posts as answer to close your threads and then start a new thread if you have a new question.

  • 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' ) ;

  • 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  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 ...

  • Not authorised to have auto increment trigger on server

    Hello all. I need a few triggers set up, I have no problems setting up sequences and "before insert" triggers on my home PC setup but on the live server where I study I do not have the authority.
    I got around this before by using Forms so I set the trigger at Form level.
    I am developing a DB system that will at some stage in the future use Forms, but for now it will use HTML forms via a web browser.
    I need to have the primary key for user accessible tables to be auto incremented (on the server where I study), but how can get around the authority issue ??
    Any ideas are extremely welcome !!

    Hello all - yeah I am on a course. I too have no idea why they will not allow the students to create triggers at table level.
    The 1st system I developed at home I had auto incremented primary keys. It was using Oracle Forms as the front end. Because I am the admin on my home setup I didn't have any problems.
    When I went to the course site to implement exactly what I had at home (which worked 100% properly) inserting data via the forms was not working. I had no idea why. the lecturer guy took a look at my code and told me its because of the trigger, I do not have authority to create triggers on the server.
    "create or replace trigger cust_trg
    before insert on customer
    for each row
    begin
    select cust_seq.nextval into :new.cust_id
    from dual;
    end;"
    The above code works fine on my home PC. I used Pre Insert triggers on the block on the Form instead to get around the problem (I presumed it was because they wanted us to learn Forms more thoroughly).
    This next project does not involve forms but they will not change my access rights so I don't have a clue as to how to get an auto incremented primary key whilst using a HTML form.
    Kevin

  • The great SQL ColdFusion Auto Increment fiasco

    Hello all and thanks in advance for your help. I am
    working on an Insert Record page using ColdFusion 7, Dreamweaver 8
    and SQL Server 2000.
    The SQL DB has a table called Articles. The table Articles
    has a Primary Key field called ArticleID which is set to a type of
    "Numeric, Identity:Yes, Seed:1, Increment:1" and no Null allowed.
    I am getting an error message of:
    Variable
    PAGENUM_RSARTICLES is undefined.
    The error occurred in
    D:\Inetpub\guardyourself\backend\article_add.cfm: line 107
    105 : </cfquery>
    106 : <cfset MaxRows_rsArticles=10>
    107 : <cfset
    StartRow_rsArticles=Min((PageNum_rsArticles-1)*MaxRows_rsArticles+1,Max(rsArticles.Record Count,1))>
    So. How do I get the ArticleID field on the CF page to see
    what the last SQL row shows for an ArticleID... and then add one?
    I'm stumped. Any help you can provide would be greatly appreciated.
    Code for the page in question is as follows or you can just go to :
    http://www.guardyourself.org/backend/article_add.cfm

    I think there may be a little confusion about what a
    uniqueidentifier field type is. You're talking about two separate
    concepts as though they are one. To create a field which
    "auto-increments" in SQL Server, you need to create the field as a
    numeric type and then specify that the field is an identity field
    (you can also specify the start and increment values). On insert,
    SQL Server will assign values to this field based on the criteria
    you supplied. If you do this, you will typically want to omit the
    value and field from your ColdFusion inserts as you have described
    below.
    What you have done instead is to create the field as a
    uniqueidentifier which requires a GUID value to be stored there.
    You cannot "increment" a GUID. The GUID for new records must either
    be generated by SQL Server (using the newID() function) or
    externally in your code. You must pass this value on insert from
    ColdFusion.
    Hope this helps.
    Adam

  • 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' ) ;

  • CMP with auto-increment primary key.Please help

    Hi all,
    I new with EJB technology so please bear with me.
    Env: 2k Server, SQL 2k Server
    Sun One(Forte EE) to develop and deploy CMP
    I got the servlet to load the data from CMP's business mehods
    is fine. Calling the findPrimaryKey is OK too. Even when I try to insert the row into DB is OK. At this time I make key PK is int AND NOT
    AUTO INCREMENT everything is OK. In the ejbCreate method
    I called setPK, setName ...It's fine.
    The problem comes when I try to make the PK(still int) to be auto-increment field.In ejbCreate not call setPK because of in SunOne IDE, under the J2EE RI tab of EJB Module property, the Auto generate SQL I set to false so that I can
    modify the SQL statement under SQL Deployment.createRow not taking the PK. I thought that will do it but it doesnot like it at all (I got Exception with transaction rollback)I just want to insert a single row with ID and name that's all.
    Then I changed the SQL statment take PK and changed the Auto Generate SQL to True and in ejbCreate the PK as one of the args and called setPK this time with null object. It doesn't like neither.(Exception Cannot set the primary key with null. That is reasonable.)
    I thought using EJB fast and clean technique would help developer to develop application with easiness.
    So I realy stuck with this, I wonder ejb 2.0 support for auto increment at all because I would like to take advantage of the auto increment feature of the DB without writing the PrimaryKeySequence generator at all.
    Am I missing something with this? May be just config thing to tell
    that my PK is auto-increment field so that when the ejbCreate called it knows not taking the PK or even not asking to call setPK in ejbCreate.
    Any help would appreciated.

    Check out this thread, there's a bunch of good info:
    http://www.theserverside.com/patterns/thread.jsp?thread_id=4976

  • How to get auto-increment value after insert on ACCESS db?

    When you insert a new record to a table with an auto-incrementing key, how do you find the value for the row you just inserted? This works differently with different databases. I know how it's done on ORACLE and mySql.
    How does it work with ACCESS through ODBC? How about MSSQL?

    I have discovered there's a LAST aggregate function which when I've tested it gets the just inserted auto-increment, but I'm not sure if it's reliable. You have to do:
    SELECT LAST(index-field) FROM table
    That ought to be faster than MAX, which I've noticed some people use. Persumable LAST will get the value from the last row in the table's natural order.
    In fact an auto-increment field has no business filling in missing slots since the main point is a a foreign key in other tables and a foreign key pointing to a deleted table row ought to be invalidated, not point to some unrelated successor record.
    I could use a separate table as a source of counters, of course, though that's one more call. In either case I'm worried about thread safety. In Oracle there are special sequence objects for this purpose which are incremented and read atomically. I'm not sure if the access driver transaction handling works adequately.
    Perhaps the safest approach might be to use a separate sequencer table and Java sychronisation to serialise access to each row in the sequencer table (assuming all the access is from the same app).

  • Auto Increment of primary key value in jdeveloper.

    hi all,
    i have one table with one primary key.
    i want to increment that primary key when ever i go for CreateInsert or create operation in JSF page.
    i have tried with db sequence value type, but i was not able to achieve my condition. in DB Sequence i got error like cannot convert java.class.string to java.class.dbsequence.
    can any one suggest me in this to achieve my condition.
    regards,
    M vijayalakshmi.

    hi all,
    from this i found the simple method to achive the auto increment of primary key.
    http://www.techartifact.com/blogs/2012/10/adding-number-for-primary-key-in-oracle-adf-using-groovy-by-sequence.html#ixzz2EeU9CWo6
    in this am facing an one small issue.
    intial value of the primary key is 1.
    for this value i have entered the row of data.
    again i have clicked on the create button.
    then the value of the primary key has increased to 2.
    for this value i didnt entered the row of data to databse.
    just i closed the browser.
    if i run the run page again, the value of primary key is 3.
    my requirment is i shd get the value of primary key is "2".
    the increment shd happen the maxi value present in the primary key of the table.
    can any one help me in this how to achive this.
    thanks in advance.
    regards,
    M vijayalakshmi.

  • Auto Increment Not Working - SQL Identity field

    I am new to Visual Basic & SQL server but have some experience in Access & VBA. But this is a steep learning curve!
    I am banging my head against a wall with a problem..
    All of my tables in this database are in the dataset. The main one being tblItems with a PK 'ITEMID'
    I have 2 forms - the first one is used to lookup an item the second displays the item's full details.
    On the first form (lookup) I have a 'Add New' button which launches the second form with the code - frmProductDetail.VItemsBindingSource.AddNew()
    This opens the form with empty boxes as expected. I have a 'Save' button on the second form with the following code -
            Dim row As SASHItemsDataSet.tblItemsRow
            row = SASHItemsDataSet.tblItems.NewRow
            With row
                .ITEMCODE = txtItemCode.Text
                .ITEMDESCRIPTION = txtItemDescription.Text
                .CATEGORY = cmbItemCategory.SelectedValue
                .PURCHCOST = txtPurchCost.Text
                .SELLCOST = txtSellPrice.Text
                .UNIT = cmbUOM.SelectedValue
                .VATID = cmbVAT.SelectedValue
                .WHLOCATION = cmbWHLoc.SelectedValue
            End With
            SASHItemsDataSet.tblItems.Rows.Add()
            Try
                Me.Validate()
                Me.VItemsBindingSource.EndEdit()
            Catch ex As Exception
                MsgBox(ex.Message, MsgBoxStyle.Critical + MsgBoxStyle.OkOnly, "UPDATE FAILED")
            End Try
    My problem is I get the error msg box with the following error 'Column 'ITEMID' does not allow nulls'
    This field is set as a auto incrementing identity field with all the correct settings shown in Visual Studio so it shouldn't be coming back as null.
    I have Googled for hours & tried all sorts with no luck..
    I have clearly gone wrong somewhere but I can't work out where... any help appreciated!
    James

    This is the code on frmProductLookup that opens the form...
            frmProductDetail.Show()
            frmProductDetail.VItemsBindingSource.AddNew()
    This is the code on frmProductDetail_Load...
            'TODO: This line of code loads data into the 'SASHItemsDataSet.tblVAT' table. You can move, or remove it, as needed.
            Me.TblVATTableAdapter.Fill(Me.SASHItemsDataSet.tblVAT)
            'TODO: This line of code loads data into the 'SASHItemsDataSet.tblWarehouseLocations' table. You can move, or remove it, as needed.
            Me.TblWarehouseLocationsTableAdapter.Fill(Me.SASHItemsDataSet.tblWarehouseLocations)
            'TODO: This line of code loads data into the 'SASHItemsDataSet.tblStockUnits' table. You can move, or remove it, as needed.
            Me.TblStockUnitsTableAdapter.Fill(Me.SASHItemsDataSet.tblStockUnits)
            'TODO: This line of code loads data into the 'SASHItemsDataSet.tblItemCategory' table. You can move, or remove it, as needed.
            Me.TblItemCategoryTableAdapter.Fill(Me.SASHItemsDataSet.tblItemCategory)
            'TODO: This line of code loads data into the 'SASHItemsDataSet.vItems' table. You can move, or remove it, as needed.
            'Me.VItemsTableAdapter.Fill(Me.SASHItemsDataSet.vItems)
            Me.VItemsTableAdapter.Fill(Me.SASHItemsDataSet.vItems)
            Me.VItemsBindingSource.Position = Me.VItemsBindingSource.Find("ITEMID", _passedText)
            Me.txtWKSName.Text = Environment.MachineName
            Me.txtSellPrice.Text = FormatCurrency(Me.txtSellPrice.Text)
            Me.txtPurchCost.Text = FormatCurrency(Me.txtPurchCost.Text)
            Me.txtPriceIVAT.Text = FormatCurrency(Me.txtSellPrice.Text + (Me.txtSellPrice.Text * 0.2))
    On the tblItemTableAdapter this is the Command Text for the Insert Command...
    INSERT INTO tblItems
                             (ITEMCODE, ITEMDESCRIPTION, UNIT, WHLOCATION, VATID, PREFSUPPLIER, CATEGORY, PURCHCOST, SELLCOST, INACTIVE)
    VALUES        (@ITEMCODE,@ITEMDESCRIPTION,@UNIT,@WHLOCATION,@VATID,@PREFSUPPLIER,@CATEGORY,@PURCHCOST,@SELLCOST,@INACTIVE)
    SQL Server Management Studio clearly shows the column as an Identity column. If I add a row through SSMS it does create an PK identity automatically. I have also dropped the ITEMID column & recreated through SSMS which has no effect.
    I am now considering creating a separate form just for adding an item but I have managed it in Access but am just struggling with VB!
    Thanks,
    James

  • How can I automatically increment an auto incremented column?

    Hello!
    I have a table with an auto incremented "id" field.
    It looks like this:
    id (PK, auto_increment) name address phone
    I would like to make an insertion like:
    INSERT INTO Person (name, address, phone) VALUES (?,?,?)
    ...but it says that all fields have to be used.
    I get
    java.sql.SQLException: Field 'id' doesn't have a default value
    How can I bypass this?
    I have looked at [this example|http://blog.taragana.com/index.php/archive/java-how-to-get-auto-increment-values-after-sql-insert/] , but it didn´t work for me, it still says the "id" column has not a default value:

    Sorry, it is a MySQL database.
    The table consists of 4 columns:
    id (PK, auto_increment)
    name (Varchar)
    address (Varchar)
    phone (Varchar)
    If I use PHPMyAdmin to insert a new row, then this query works:
    INSERT INTO `mydb`.`person` (
    `id` ,
    `name` ,
    `address` ,
    `phone`
    VALUES (
    NULL , 'Test', 'Roxxor', 'Europe', '12345'
    );{code}I tested to use the method setNull() on the first column in the preparedStatement but it didn&acute;t work.
    Do you need more info from me to be able to help me?
    I have tried this (but got the error that the "Field 'id' doesn't have a default value"):
    [code]con.setAutoCommit(true);
                String query = "INSERT INTO person(id, name, address, phone) VALUES (?, ?, ?, ?)";
                PreparedStatement stmt = con.prepareStatement(query);
                stmt.setNull(1, java.sql.Types.NULL);
                stmt.setString(2, name); 
                stmt.setString(3, address);     
                stmt.setString(4, phone); 
                stmt.executeUpdate(); 
                stmt.close();[/code]                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

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