Does JDBC insert a value into the Primary Key?

Hi,
I'm using a servlet to input data froma n html form ,into an ACCESS Database.I'm using SQL statements i t he servlet ,and i'm confronted with the question:
ALL database records are indexed with B_ID as the "Primary Key".
I want to know: If I add the fields without a B_ID ..will SQL/JDBC/Access automatically add one for me?
Or must I create the system that will count the records before adding a new B_ID?
Hope you can help me.Thanks!
Aesh83

Access has a datatype claus for this autoincrement feature.
I just can't remember its name.
If you have such a primary key column in your table, you would simply insert values in each column except that, so this would automatically generate its value by incrementing the key.
Your INSERT had to enumerate all columns you explicitely fill with values and skip this key column and those ones which shall be set to NULL btw. the defined default value (is there a DEFAULT clause in Access?)

Similar Messages

How can I insert a value into the Oracle Date column using JDBC?

Suppose I have a table TEST created by "create table TEST (c1 INT, c2 Date);"
Now I want to insert some proper value into the table TEST's column c2. I couldn't do that by TRYing using Java.sql.Date, Java.Util.Date, Java.String.
Could anyone give me some suggestions by providing the sample code?
Many thanks for your help!
Wendy

What about building the java string:
"Insert into test (c1,d1) values ("+
Integer.toString(var)+
", TO_DATE("
formatYourDateVariableWithCalendarMethods
",'DD-MON-YYYY')"
and executing it ??

Insert record and return the primary key

Okay, I need to insert a record into a MSSQL database and return the primary key of that record. Im using the following code which is obviously wrong as I'm getting either 'NULL' or 'com.microsoft.jdbc.base.BaseResultSet@1d520c4' returned depending on the ways I've tried. The primary key is an int value called clientID which is incremented by one each time a new record is added.
// set the prepared statement
            String sql="INSERT INTO Client(username, country, clientIP, browser, os) VALUES(?,?,?,?,?)";
            PreparedStatement pstmt = conn.prepareStatement(sql);
            pstmt.setString(1, inUserName);
            pstmt.setString(2, inCountry);
            pstmt.setString(3, inClientIP);
            pstmt.setString(4, inBrowser);
            pstmt.setString(5, inOS);
            // Insert the row
            pstmt.executeUpdate();
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT SCOPE_IDENTITY()");
            System.out.println("Result "+rs);The primary key value is needed so that it can be used as a foregin key in another table. Am I going about this the correct way? Any help, pointers or code fixing would be appreciated.....

Yes. I tried this way but I only ever get the answer
of 0 when i print our the result! Not really sure
whats happening.That's because you don't print a ResultSet like that. In order to get the key out, you have to do this:
int key = 0;
while (rs.next())
    key = rs.getInt(1);What were you thinking with your code?
You might want to do this in a transaction. If the INSERT fails, you'll want to roll back.
The "select @@identity" is correct for M$ Access, SQL Server, and Sybase. I believe it's also correct for MySQL, but I'm not 100% certain of that.
%

Modify the value of the primary key...

Hi all,
I have made a mistake in the design of the table......
and it is too late to get it changed....
I have set the wrong field as primary key...
These fields (keys) need to be modify , since i ve set it as a key, when ever modify those fields using
"MODIFY ZTABLE VALUE INT_TABLE . ", it create a new row into the table because i change the primary key value. Using "UPDATE ZTABLE ....." it doesnt works because the key's value has changed.
Thank you very much friends...

Hi Wong,
If the primary key value does not exist then MODIFY statement creates a new record and if exists it modifies(updates)...
So better change the Table Primary key and try to reapeat u r code...
For changing the primary key just goto SE11 and just check the primary key which u want to assign and uncheck the preivous one ( make sure the primary key on to first line) then save it and before activating goto<b> Utilities --> Database Utility --> activate and adjust database</b>
Now u r table is activated without deleting previous data also...
Regards,
Sridhar

How do you change the value of the primary key in the CMP?

Hi,
The cmp that I built has the phone as the Prikey field.
The bean has the get/set methods. The servlet invokes the cmp
to change the phone number. How could I do that?
The setXXX for the priKey can not be called outside of the ejbCreate() so
how would I change the prikey value of a particular row of the table. Do I have
to remove the bean then create the new bean with the new priKey value?
Please help,
Thanks

Thanks Mona
Tom.
Mona Ramlawi <[email protected]> wrote:
Hi TOM,
The primary key is the unique identifier of an Entity Bean.
To change it, you have to remove the bean instance = database delete
then you have to create a new one with the new primary-key value =
database insert.
Hard luck tom, maybe you should consider changing your primary key. You
can easily change it to an AutoNum
Tom wrote:
Hi,
The cmp that I built has the phone as the Prikey field.
The bean has the get/set methods. The servlet invokes the cmp
to change the phone number. How could I do that?
The setXXX for the priKey can not be called outside of the ejbCreate()so
how would I change the prikey value of a particular row of the table.Do I have
to remove the bean then create the new bean with the new priKey value?
Please help,
Thanks

SQL Server 2012 Management Studio: Creating a Database and a dbo Table. Inserting VALUES into the table. How to insert 8 Values for future use in XQuery?

Hi all,
In my SQL Server 2012 Management Studio (SSMS2012), I tried to create a Database (MacLochainnsDB) and a dbo Table (marvel). then I wanted insert 8 VALUES into the Table by using the following code:
USE master
IF EXISTS
(SELECT 1
FROM sys.databases
WHERE name = 'MacLochlainnsDB')
DROP DATABASE MacLochlainnsDB
GO
CREATE DATABASE MacLochlainnsDB
GO
CREATE TABLE [dbo].[marvel] (
[avenger_name] [char] (30) NULL)
INSERT INTO marvel
(avenger_name)
VALUES
('Hulk', 1),
('Iron Man', 2),
('Black Widow', 3),
('Thor', 4),
('Captain America', 5),
('Hawkeye', 6),
('Winter Soldier', 7),
('Iron Patriot', 8)
I got the following error Message:
Msg 110, Level 15, State 1, Line 5
There are fewer columns in the INSERT statement than values specified in the VALUES clause. The number of values in the VALUES clause must match the number of columns specified in the INSERT statement.
How can I correct this problem?
Please kindly help and advise.
Thanks in advance,
Scott Chang
P. S.
The reason I tried to create the Database, dbo Table, and then to insert the VALUES is to learn the following thing:
You can query the entire node tree with the following xquery statement because it looks for the occurrence of any node with the /* search string:
DECLARE @x xml;
SET @x = N'<marvel>
<avenger_name>Captain America</avenger_name>
</marvel>';
SELECT @x.query('/*');
You can query the avenger_name elements from the marvel_xml table with the following syntax:
SELECT xml_table.query('/marvel/avenger_name')
FROM marvel_xml;
It returns the following set of avenger_name elements:
<avenger_name>Hulk</avenger_name>
<avenger_name>Iron Man</avenger_name>
<avenger_name>Black Widow</avenger_name>
<avenger_name>Thor</avenger_name>
<avenger_name>Captain America</avenger_name>
<avenger_name>Hawkeye</avenger_name>
<avenger_name>Winter Soldier</avenger_name>
<avenger_name>Iron Patriot</avenger_name>
You can query the fourth avenger_name element from the marvel_xml table with the following xquery statement:
SELECT xml_table.query('/marvel[4]/avenger_name')
FROM marvel_xml;
It returns the following avenger_name element:
<avenger_name>Thor</avenger_name>

Hi Scott,
The master database records all the system-level information for a SQL Server system, so best practise would be not to create any user-defined
object within it.
To change your default database(master by default) of your login to another, follow the next steps so that next time when connected you don't have to use "USE dbname" to switch database.
Open SQL Server Management Studio
--> Go to Object explorer(the left panel by default layout)
--> Extend "Security"
--> Extend "Logins"
--> Right click on your login, click "propertites"
--> Choose the "Default database" at the bottom of the pop-up window.
--or simply by T-SQL
Exec sp_defaultdb @loginame='yourLogin', @defdb='youDB'
Regarding your question, you can reference the below.
SELECT * FROM master.sys.all_objects where name ='Marvel'
--OR
SELECT OBJECT_ID('master.dbo.Marvel') --if non empty result returns, the object exists
--usually the OBJECT_ID is used if a if statement as below
IF OBJECT_ID('master.dbo.Marvel') IS NOT NULL
PRINT ('TABLE EXISTS') --Or some other logic
What is the sys.all_objects? See
here.
If you have any question, feel free to let me know.
Eric Zhang
TechNet Community Support

Cannot insert null into a Primary Key Column using Entity Framework

I have to insert data into UserPreferences Table which has a primary key. This I am doing with Oracle Entity Framework Provider.
It is unable to do it though i have set the StoreGeneratedPattern = "Identity". But while saving changes it is saying a null error is being inserted into the primary key.

I exported the same package to BIDS and ran it but still unable to get the issue. It is running fine.
Also then same package is running fine in other environments.
Thanks
Thats strange
Are you pointing to same databases itself while executing from server?
Please Mark This As Answer if it solved your issue
Please Mark This As Helpful if it helps to solve your issue
Visakh
My MSDN Page
My Personal Blog
My Facebook Page

How to pass values for compound primary keys for updating the record in db.

i have a entity bean in my ejb with two primary keys to it...eg. roleid,rolename...
when iam retriving the record i use only one primary key ...so again to modify and update he same record which i retrived is a pbm..
i cannot set the values for the compoundpk,,,
but i can do the update for the bean with single primary key..
i need to know how to pass the values/parameters for the coumpound primary key in my update method...
thanx in advance...
Arjun.G

I istantiated a object for the pk class and assign the values for the primary key fields...
Arjun.G

Am not getting the primary key of the enity but the value 0 for first eleme

Hi everyone , I have used the primary key of an entity to create a selectonechoice in my page. But when I select from the combo box am gettting the value of the first element as 0 second as 1....
How to I get the value of the primary key itself...
Thanks you for your kind cooperation .
Regards
Lutchumaya

Hi,
0 is the index of the value in the selectOne Choice
See
http://groundside.com/blog/DuncanMills.php?title=adf_the_list_binding_value_problem&more=1&c=1&tb=1&pb=1
for how to retrieve the actual value
Frank

How can I obtain the primary key of a table for an entity relation?

hello everybody
I am doing a consultation to a table in my data base, good this table has alone two fields, the first one is the code or pk and the second one is the description, to be presisos they are names of city and code.
From the beginning!!: This method this one in another class that is a Dialog that is going to call to the class SelecPlace ();
SelecPlace sl = new SelecPlace();
public void capturarLugar(){ // Simple void method in the mentioned class
        String place = txtProcedencia.getText() ; // a JTextField
        sl.executeStatement(place) ;
    }ok, now we see part of the code of the class SelectPlace
public class SelecPlace extends AbstractTableModel{
    Connection con = null;
    Statement sentencia = null ;
    ResultSet rs = null;
    ResultSetMetaData rsmd = null ;
    String[] nameColum = {} ;
    Vector datos = new Vector() ;
    public SelecPlace() { }
    public void executeStatement(String query){
      try{
         con = DBManager.getConnection() ;
         sentencia = con.createStatement(rs.TYPE_SCROLL_INSENSITIVE,
                                                                      rs.CONCUR_UPDATABLE) ;
         String sql = "select * from Place where descripcion like %"+query+"%'";
          rs = sentencia.executeQuery(sql) ;
          rsmd = rs.getMetaData();
          int nroColumnas = rsmd.getColumnCount() ;
          nameColum = new String[nroColumnas] ;
          //obtengo los nombres de columnas en cache
           for(int colum = 0; colum < nroColumnas; columna++){
                nameColum[colum] = rsmd.getColumnLabel(columna + 1) ;
           datos = new Vector();
            while(rs.next()){
                Vector newRow = new Vector();
                for(int i = 0; i < getColumnCount(); i++){
                newRow.addElement(rs.getObject("place_ID"));
                newRow.addElement(rs.getObject("description"));
                datos.addElement(nuevaFila);
            fireTableChanged(null);
        }catch(SQLException e){
            System.err.println(e);
            e.printStackTrace(System.err);
            System.out.println("error in statement");
        }catch(ClassNotFoundException cnfe){
            System.err.println(cnfe);
    }Ok, this code me works and I obtain in this case the field description of the table Place
Now my question is, how can I obtain the primary field of my table?
I need this value of this field that in the base of information in a bigint, and to take it to the first class before mentioned, for that I am working with a data base related

Certain duffymo and everyone!!, good I give you my scheme:
And generalizing my question, I want to obtain the value of the primary key of a table in the database, I obtain more values of the same row, but I need the primary key, and you see one with the primary key I want to turn a Long and it to insert with code java in foreign clave in another table of the database
Good of this form I believe that it would not be breaking the integrity relacional of the tables

Getting the primary key from order form

Does anyone know how to get the primary key (DocEntry) off of the order form for an existing order? I don't really want to use the DocNum field since it is not the primary key and theoretically two different orders could have the same DocNum. Thanks in advance for your help.

Hi Joe,
DocEntry and DocNum values are unique, so you cannot have in db 2 orders with the same DocNum. It's possible, that DocEntry and DocNum values can vary.
If you know the DocNum value (f.e. from Order's Form), you can simple use RecordSet object:
Dim sQuery as String
Dim oOrder as SAPbobsCOM.Documents
Dim oRecordSet As SAPbobsCOM.Recordset
Set oOrder = oCompany.GetBusinessObject(oOrders)
Set oRecordSet = oCompany.GetBusinessObject(BoRecordset)
sQuery = "Select DocEntry From ORDR Where DocNum = '" & DocNumber & "'"
oRecordSet.doQuery sQuery
If oRecordSet.RecordCount > 0 Then
oOrder.GetByKey(oRecordSet.Fields(0).Value)
End If
And this should work.
Regards
Libor.

Key value does not currently exist in the primary key table error

Im testing out a form and creating a new insert once all the fields are filled in it wont allow me to move on and comes up with this error message;
key value does not currently exist in the primary key table
Is this becuase the form contains foriegn keys which reference different tables which fields are not dispalyed on this form?
If so how to I link the other forms together so that when i create a new record in this form it will automaticaly create the primary key entry in the other form to allow the insert of the referenced foreign key in this form?
does this make sense?

It seems that it has the table in which you'r inserting is a foreign key table.
Take the emp& dept table example in the schema scott/tiger.
Say we have deptno 10, 20, 30, 40 in the dept table.
We make a form for emp table and insert into this form.
Now, we'r bound to insert deptno 10, 20, 30, 40 into this emp form. This form will not allow us to insert deptno 50 as it doesn't exist in the primary key column in dept table.
Obviously if a department doesn't exist in the company, it doesn't make sense to assign the employees to that department.
So for this purpose, we need to add a department in the dept table then we can insert values in the emp table for that department.
For this purpose, I suggest to make a button on the mp form and invoke the dept form and add a new department to it and then insert into emp table.
The same scenario can be applied in your case.

Multi-table mapping is not inserting into the primary table first.

I have an inheritance mapping where the children are mapped to the parent table oids with the "Multi-Table Info" tab.
One of children is not inserting properly. Its insert is attempting to insert into one of the tables from the "Additional Tables" of "Multi-Table Info" instead of the primary table that it is mapped to.
The other children insert correctly. This child is not much different from those.
I looked through the forums, but found nothing similiar.

I would expect the Children to be inserted into both the primary table and the Additional Table? Is the object in question inserted into the primary table at all? Is the problem that it is being inserted into the Additional Table first? If it is, are the primary key names different? Is it a foreign key relationship?
If the object in question has no fields in the additional table is it mapped to the additional table? (it should not be)
Perhaps providing the deployment XML will help determine the problem,
--Gordon

Why does my Apple Mail insert old messages into the body of new emails?

Why does my Apple Mail insert old messages into the body of new emails? The correct sender's name will appear in the "From" column, but an old message from a different sender in the body. This happens randomly. I have an iMac OSX 10.6.8. I recently had the hard drive cleaned, but Apple Mail seemed to be running fine when I set it up again. Could this be a virus? What should I do about it? Thanks for any insights!

Thanks. While you were replying to my question, I went into notifications and figured
it out. Appreciate the quick response!

Help me to return the primary key after insert the row

Hi
I am using JDBC, with oracle database. i have welformed normalization tables .i am inserting parent table with dynamic sequence number as primary key .after inserting i need inserted row primary key .how to get the inserted row primary key with out using select statement
please help me
Thanks in advance
Edited by: 849614 on Apr 4, 2011 5:41 AM
Edited by: 849614 on Apr 4, 2011 5:54 AM

Hello
If I undestand you, I think you should do this:
Connection conexion = dataSource.getConnection();
int idCenter=-1;
String query = "Begin Insert into CENTER (NAME_CENTER) values (?) returning ID_CENTER into ?; end";
callableStatement = conexion.prepareCall(query.toString());
     callableStatement.setString(1, "Center name");
     callableStatement.registerOutParameter(2, java.sql.Types.INTEGER);
          callableStatement.executeUpdate();
          idCenter=callableStatement.getInt(2);
This way, you have in idCenter the primary key of the line that has just been inserted.
Edited by: cris on 05-abr-2011 5:28

Does JDBC insert a value into the Primary Key?

Similar Messages

Maybe you are looking for