How to cache data from database

Hi all,
How can i cache the data from a database, so that i don't have to go to database again and again to get the same results.
thanks in advance
gcs

Well, you can make a structure to match the record layout for your data and put each record in a collection. Search the collection each time before you go out to the database. You may want to overload the contains method or make your own method that checks according to just your key values though.

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How to Cache Data from database for java mapping ?

Hi
I have a scenario where i have to dynamically query a huge table in some other database from java mapping code.
Therefore instead of making a new Database trip everytime is there a mechanism by which i can cache the entire table contents into XI first and then use this cache for looking up data through my java mapping.
Any other alternative also welcome which would give best performance.
Please Suggest
regards
Nilesh Taunk.

Hi Nilesh,
I am not sure if you can actually cache the table in XI. You will have to look up directly from your Database everytime your mapping excecutes.
To perform DB lookup during mapping very efficiently, I would suggest that you take a look at this blog,
/people/siva.maranani/blog/2005/08/23/lookup146s-in-xi-made-simpler
Also, instead of doing the DB look up in mapping, you can also use your JDBC adapter as a sender and collect the information you want from your DB,
If you are using your JDBC as a sender, then your JDBC will poll over your database and select the rows that satisfy your Select Query. Also, there is another field in your JDBC adapter that is very important and that is the Update satatement. Once your JDBC adapter executes your select query and selects rows from the database, you might not need those rows to be selected again. In this csse, you can use the Update statement to update the database.
http://help.sap.com/saphelp_nw04/helpdata/en/7e/5df96381ec72468a00815dd80f8b63/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/2e/96fd3f2d14e869e10000000a155106/content.htm
The choice between a JDBC sender adapter , and the DB lookup will have to be on the basis of your requirements.
Regards,
Bhavesh

How to retrive data from database views or projection views

how to retrive data from database views or projection views

Hi chintam,
1. Very simple
2. Just like normal select statement.
3. Select * from VIEWNAME.
4. (Instead of the tablename, we just have to give the viewname)
regards,
amit m.

How to display data from Database individually??? Anyone can help ?

HI,
i i had select a row of data from database using ,
/* Query * From Table RESOURCEORDER where po = selected no and project = selected project */
     public ResultSet getAllData() throws SQLException
     getConnection();
     Statement stmt = conn.createStatement();
     ResultSet rs = stmt.executeQuery("SELECT * FROM RESOURCEORDER WHERE PROJECT = '" + getSelProject() + "' and PURCHASEORDERNO = '" + getPo() + "'" );
     return rs;
After that , how do i display the data individually ?
Eg select data is ('projectA','7891203-1', '10-4-2005','lcd',2000,'121-45217-8','electrical','pending','donwong')
i want to display them individually, like this in a page
Projectname: /* should display the Project A*/
P.O no:
Date:
Order:
Cost:
Acc no:
Type:
status:
Orderedby:
Can anyone help ? cos i'm new to JSP ......Thanks alot!!!!!
Regards,
khim

I assume PO being a unique key, will always return 1 row from db.
public String[] getAllData() throws Exception
getConnection();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM RESOURCEORDER WHERE PROJECT = '" + getSelProject() + "' and PURCHASEORDERNO = '" + getPo() + "'" );
String [] returnValue = new String[9];
while(rs.next())
returnValue[1] = rs.getString("colname");
returnValue[2] = rs.getString("colname");
///and so on
return returnValue;
}Once you get that you could individually view it by setting a loop to run through the returned array.
Hope it helps

How to fetch data from database in javafx 2.2 table which is editable.

Dears!
I want to fetch data from database in javafx 2.2 tableformat with jdbc , which is also editable and i can add more records in this table also.
Can anybody help me

I can vaguely recall some sort of JavaFX database connectivity feature, I'm not sure if it's valid anymore.The link is based on JavaFX Composer which only applied to NetBeans 6.9 and JavaFX 1.x (both of which are now dead techs).
There is a good chance you will have to write your own. There are several blogs describing other peoples' work. You could probably use them as a reference.Here is Narayan's basic [url http://blog.ngopal.com.np/2011/10/19/dyanmic-tableview-data-from-database/] tutorial for displaying data from a database in a TableView, you'll need to look elsewhere for the editing portion.
The [url http://docs.oracle.com/javafx/2/ui_controls/table-view.htm]JavaFX TableView tutorial gives info about how to handle edits in a TableView, but you will need to tie the updates back to the database yourself.
It is possible that [url http://www.javafxdata.org/]DataFX may provide some facilities to help support you.

How to extract data from database to XSLT?

I want to generate a report by XSLT, but the data is extracted from the database. I will use Access/SQL server for my database. Can i write SQL in XSLT to extract data from database? Have any sample code or reference website to show how it work?
THX

for example: "SELECT code, name FROM TABLE FOR XML RAW"
String xml = null;
if(rs.next()){
xml = rs.getString(1);
}You will get xml string something like this:
<row empID="1234"/><row empID="1235"/>
You can construct a DOM using this xml data and operate on it.
However you may explore more on resulting xml format.
A different SQL Query (rather than using XML RAW) may give output in a more desired format.

How to retrieve data from database to the structure(complicated)

Hello everyone:
I want to retrieve data from database to the structure. but the structure defined like this below:
TOLERANZOB LIKE QAMV-TOLERANZOB
TOLERANZOB1 LIKE QAMV-TOLERANZOB
so how can I retrieve the data from the database ? make sure that the two fields contain data both.
Thanks in advance .
Regards
Nick

Hi Nick,
To retreive data for TOLERANZOB from QAMV,
If you know the key fields then use
SELECT SINGLE TOLERANZOB FROM QAMV INTO TOLERANZOB WHERE keyfields.
else, you can use
SELECT TOLERANZOB FROM QAMV UPTO ONE ROWS INTO TOLERANZOB WHERE....
Once you retreive the data using the select query, you can check if it is initial and if not move the data from TOLERANZOB to TOLERANZOB1.
<b>Reward points for helpful answers.</b>
Best Regards,
Ram.

Help , How to get data from database using recordset with UI API

I want to get a data from database
when I want to create recordset i notice that UI API didn't has record set
so I created recordset using DI API (SAPbobscom.recordset and SAPbobscom.company)
======================================================
Dim oCompanyUI As SAPbouiCOM.Company <<UI API
Dim oRecSet As New SAPbobsCOM.Recordset << DI API
Dim oCompanyDI As New SAPbobsCOM.Company << DI API
'=====================================================
oCompanyDI.Connect
Set oRecSet = oCompanyDI.GetBusinessObject(BoRecordset)
oRecSet.DoQuery ("SELECT T0.CardCode, T0.CardName FROM OCRD T0")
SBO_Application.MessageBox oRecSet.Fields.Item(1).Value
======================================================
but I got an error it said "you are not connected to company"
I'm really don't have an idea about how to get a data from using UI API (exp I want to get a date or costumer code)
can someone help me please, I really need it
Thanks

you need a single sign on
        Dim oDICompany As SAPbobsCOM.Company
        Dim sCookie As String
        Dim sConnStr As String
        Dim ret As Integer
        oDICompany = New SAPbobsCOM.Company
        sCookie = oDICompany.GetContextCookie
        sConnStr = SBO_Application.Company.GetConnectionContext(sCookie)
        If oDICompany.Connected Then
            oDICompany.Disconnect()
        End If
        ret = oDICompany.SetSboLoginContext(sConnStr)
        If Not ret = 0 Then
            SBO_Application.MessageBox("set Login Context failed!")
            Exit Sub
        End If
        ret = oDICompany.Connect()
        If Not ret = 0 Then
            SBO_Application.MessageBox("Company Connect failed!")
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How to put datas from database in html�s forms?

Does anyone have any idea how to put datas from the database using JSP???

One option: put your data into a JavaBean and then put that into the session. You can then access it from your JSP. You can access the properties of the bean using the basic JSP scripting elements, or if you want to get fancy, both JSTL and Struts have a bunch of custom tags for working with JavaBeans.

Oracle form: how to retrieve data from database to pop list

I have problem in retrieving data from database to item list in
oracle forms.
Can anyone help me.
thanks.

The next is an example but you can find this information in
Forms Help:
DECLARE
     G_DESCS RECORDGROUP;
     ERRCODE NUMBER;
     rg_id RECORDGROUP;
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BEGIN
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END;
Saludos.
Mauricio.

How to download Data from Database directly into excel

I have a requirement to download very large quantity of data from database into Excel file.
But condition is excel file should have only 65,536 rows in a single spread sheet(that's the limit i suppose),if i have more data points(rows) than it should be stored into different spreadsheet.......this continues so there can be many spread sheets in a single excel file.
Data size can be 1 GB or more.
Also specific naming conventions need to be followed for giving name to excel as well as different spread sheets in it.
Please see if someone could help me out.

Thanks for ur reply,
But my requirement is to call "download to excel" method,in a java program on click by user for downloading an excel sheet on his machine.
This is be done as part of a web application which is to be made (so can't open the excel first)

How to put data from database into array

I need to answer hot to put data from database directly into array.
I tried like the code below but the error message said: java.lang.ArrayIndexOutOfBoundsException: 0, and it points to this line: numbers [row][0]= rs.getString("ID");
Hope you can help.
ResultSet rs = stmt.executeQuery(query);
     int row=0;
     String [] [] numbers=new String [row][10];
     // output resultset
     while ( rs.next() )
          numbers [row][0]= rs.getString("ID");
          numbers [row][1]= rs.getString("name");
     row++;
     // close resultset
     rs.close();
thanks,Devi

The exception is been thrown simply because you assigned '0' to the 'row' variable, indicating a zero length of the array. In fact you should assign the row count to it.
After all, don't do that. Make use of the Collection framework and map the ResultSet to a Collection of DTO's.
List<User> users = new ArrayList<User>();
while (resultSet.next()) {
    User user = new User();
    user.setID(resultSet.getString("ID"));
    user.setName(resultSet.getString("name"));
    users.add(user);
}

How to get data from database to JComboBox

hi
i am trying to get data which is in database. here the problem is i am getting only one row in the JcomboBox
i want all data just like list. i dont know how to get that . below is the code plz any one help me....
import javax.swing.*;
import javax.swing.JList.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.String.*;
import java.lang.Integer.*;
import java.sql.*;
public class customer_code extends JFrame implements ActionListener
Container c=getContentPane();
JLabel customer_code=new JLabel("Customer Code and Name");
customer_code()
super("Customer Details");
setSize(300,250);
setVisible(true);
setLayout(null);
setLocation(430,310);
Font f=new Font("SansSerif",1,16);
Font f1=new Font("SansSerif",0,14);
customer_code.setBounds(10,20,250,30);
add(customer_code);
customer_code.setFont(f);
ResultSet rs=null;
String j=null,k=null;
try
System.out.println("MySQL Connect Example.");
Statement st=null;
Connection con=null;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:project","vikky","vishu");
System.out.println("Connected to the database");
st=con.createStatement();
rs=st.executeQuery(" select code as c,Customer_name as n from customer_details ");
while(rs.next())
j=rs.getString("c");
k=rs.getString("n");
System.out.println(j);
System.out.println(k);
String[] names = new String[] {j,k};
JComboBox comboBox = new JComboBox(names);
add(comboBox);
comboBox.setBounds(25,60,250,50);
comboBox.setFont(f);
comboBox.addActionListener(this);
comboBox.setMaximumRowCount(10);
con.close();
System.out.println("Disconnected from database");
catch (Exception e)
e.printStackTrace();
public void actionPerformed(ActionEvent event)
if ("comboBoxChanged".equals(event.getActionCommand()))
System.out.println("User has selected an item from the combo box.");
JComboBox comboBox = (JComboBox) event.getSource();
if(comboBox.getSelectedItem().equals("None"))
public static void main(String agr[])
customer_code cd=new customer_code();
}

r035198x wrote:
Also separate that database code from interface display code.
You should never access the database on the EDT.
See [Doing Swing Right|http://bytes.com/topic/java/insights/853297-doing-swing-right] for more details.
Yes! By the time you are working with Swing and JDBC you should already know how to structure code. If not, then you are not ready for these topics and you've jumped the gun.

How to fetch data from Database using SUP MBOs

I'm learning to develop blackberry apps using SUP.I am new to both blackberry api and SUP.
I need to make a login page for a Student and then validate the username and password entered using data from a database.
I need to check the database for the username and password entered. What should be my next step? How do i get this data from the database. Using findAll() method is not working . Do i need to connect to SCC or unwired server first. If yes , then someone please provide a sample code for it.

Hi!, I see your code and I see that you have a fee errors, try to use this:
import java.text.*;
import java.sql.*;
import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.OutputStream;
* NOTE: You must put the try-catch and your sql code into the get method
/** Servlet program to take fetchdata from database and display that on the broswer*/
public class Fetchdata
    extends HttpServlet {
String query = new String();
String uid = "ashvini";
String pwd = "******";
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
      ServletException, Exception {
    try {
      Connection con = null;
      Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
      String url = "jdbc:odbc:Testing";
      con = DriverManager.getConnection(url, uid, pwd);
      Statement s = con.createStatement();
      query = "select * from gowri.msllst1";
      ResultSet rs = s.executeQuery(query);
      response.setContentType("text/html");
      ServletOutputStream out = response.getOutputStream();
      out.println("<HTML>" + "<BODY BGCOLOR=\"#FDF5E6\">\n" +
                  "<H1 ALIGN=CENTER>" + title + "</H1>\n" +
                  "<table>" + " <th>ITEM Code</th>");
      while (rs.next()) {
        out.println("<tr><td>" + rs.getString(1).trim() + "</td></tr>");//I change </tr></td> for </td></tr>
      } //end of while
      out.println("</table></BODY></HTML>");
    catch (Exception e) {
      System.out.println(e);
} //end of doGet method
}I hope this help you :)

How to Retrieve data from database into another form ?

Good Day!
Am currently new at JSP. I've been studying it for awhile and still getting the hang of it. We are working on a project.
Editing a given data. We have to retrieve the given data and post it to another form "Editing form".
Since we can retrieve data using JSP but how are we going to post it to another form? I mean how are we going to transfer data from one form to another?
Can anyone help me with codes please..

The client is a web browser.
The client submits a request (click a link, visit a form)
The server gets to respond to this
- look at request parameters from the client
- access database
- produce resulting html page
- send page back to client.
The standard pattern is to retrieve data from the database in java code, and then load that data into a bean.
You then make that bean available as an attribute
It is then available for use in your JSP - either <jsp:useBean> tag or using ${ELexpressions}
All you can pass from the client to the server is request parameters - which are always strings.
Draw a picture of where the information is, and the information flows. Very rarely does it go directly from one "form" to another.
Cheers,
evnafets

How to cache data from database

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