How to retrieve information from a database View name
For a given database View name, is there any way to retrieve what are the columns (also the corresponding table name) associated with that View?
I am getting the view names by using DatabaseMetaData APIs.
Now I want to retrieve the info associated with that view.
Any help will be highly appreciated.
If all else fails then since you have the view name then "select * from viewname where 1=0" should work.
Similar Messages
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How to get information from Oracle's views
Hi,
I need to get information from Oracle's views about:
* in which table's column is set index
* what type of index is on this column
* name of a trigger which exist on a table
* type of trigger (before, after etc)
* trigger status (enable, disable)
Thanks for help.Hi..
One of the best way to know which views to use is doing select * from dict where table_name like 'xxx';
For example in your case you needed to know about the indexes and triggers so
SQL> select * from dictionary where table_name like 'DBA_IND%';
TABLE_NAME COMMENTS
DBA_INDEXES Description for all indexes in the database
*DBA_IND_COLUMNS COLUMNs comprising INDEXes on all TABLEs and CLUSTERs*
DBA_IND_EXPRESSIONS FUNCTIONAL INDEX EXPRESSIONs on all TABLES and CLUSTERS
DBA_INDEXTYPES All indextypes
DBA_INDEXTYPE_COMMENTS Comments for user-defined indextypes
DBA_INDEXTYPE_ARRAYTYPES All array types specified by the indextype
DBA_INDEXTYPE_OPERATORS All indextype operators
DBA_IND_PARTITIONS
DBA_IND_SUBPARTITIONS
DBA_IND_STATISTICS Optimizer statistics for all indexes in the database
10 rows selected.
SQL> select * from dictionary where table_name like 'DBA_TRI%';
TABLE_NAME COMMENTS
DBA_TRIGGERS All triggers in the database
DBA_TRIGGER_COLS Column usage in all triggers
Reading the comments you can know which view to use, then describe the view and use what you need -
How to retrieve information from server?
Hi,
I'm currently working on a project, which is implemented with JSP. The function of the JSP is to connect to different servers within the Intranet(IP address already known) and get database list & file list residing on each server. And then compose all those information into a table, and display them in JSP. I just wonder how can I connect to those server? Can I just set up a socket client? Once the connection between servers has been setup, how can I retreive information from server? Are there any reference I can use? Thank you very much for your considerations.
MyraActually, I need extract some information from the file, and those files are on the server. In this case, do you think I should use FTP client to visit server? The server is running with Weblogic.
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How to retrieve information from XML using servlets
Hi
I have a scenario like this
File-->XI-->J2ee application(HTTP Receiver adapter)
I want to know how XI sends xml file as a query string file name?
What ever may be the case i just need to retrieve the information from Request object and display the same in browser(JSP).How to do that, I am totally confused, please anyone help me!
Code help is highly rewarded.
ThanxHi Rajesh!
I have tried your code. But some where i went wrong. Please correct me: I am using NWDS2.0.9
my web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>WEB APP</display-name>
<description>WEB APP description</description>
<servlet>
<servlet-name>DisplayRes</servlet-name>
<servlet-class>com.quinnox.DisplayRes</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DisplayRes</servlet-name>
<url-pattern>/DisplayRes/*</url-pattern>
</servlet-mapping>
</web-app>
my application.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application PUBLIC "-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN"
"http://java.sun.com/dtd/application_1_3.dtd">
<application>
<display-name>ReceiverEntpr</display-name>
<description>EAR description</description>
<module>
<web>
<web-uri>HttpReceiver.war</web-uri>
<context-root>/HttpReceiver</context-root>
</web>
</module>
</application>
and my servlet code:
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.Writer;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.xml.sax.EntityResolver;
import org.xml.sax.SAXException;
import com.sun.java_cup.internal.parser;
import com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl;
public class DisplayRes extends HttpServlet {
public void doGet(HttpServletRequest requset, HttpServletResponse response) throws ServletException, IOException
doWork(requset, response);
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
doWork(req, resp);
private void doWork(HttpServletRequest req, HttpServletResponse resp) throws IOException
String path = null;
PrintWriter out = null;
PrintWriter p2=resp.getWriter();
try
resp.setContentType("text/xml");
out = resp.getWriter();
out.println("hi");
path = req.getPathInfo();
if(req.getContentLength() != -1){
outputURI(req.getInputStream(), out);
} catch (IOException ioe) { return;
//private void outputURI(InputStream resultStream, Writer out) {
private void outputURI(InputStream resultStream, PrintWriter out) {
if (resultStream == null) {
// no default file
// logger.error("No File to return");
return;
try {
DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
// Class clazz = loader.loadClass("org.apache.xerces.jaxp.DocumentBuilderFactoryImpl");
// DocumentBuilderFactoryImpl factory = (DocumentBuilderFactoryImpl) clazz.newInstance();
// DocumentBuilder parser = factory.newDocumentBuilder();
parser.setEntityResolver(new ClassPathEntityResolver());
printXML(parser.parse(resultStream), out);
resultStream.close();
} catch (Exception e) {
// logger.error("Trying to parse the output " , e);
//private void printXML(Document document, Writer writer) throws Exception {
private void printXML(Document document, PrintWriter writer) throws Exception {
Transformer transformer = TransformerFactory.newInstance().newTransformer();
Source source = new DOMSource(document);
Result output = new StreamResult(System.out);
transformer.transform(source, output);
// Write as XML so that entity references can be resolved.
if (writer != null) {
transformer.transform(source, new StreamResult(writer));
Please tell me how to display in servlet.
If it is better to display in a browser. Please send me the code.
Thanks -
How to retrieve data from the Database after deleting rows from VO ?
Hello,
I am using Jdeveloper 11.1.2.1.0
I have a master and a child .
So according my use case when a value in the master vo changes the corresponding child has to be deleted.
but when i change back to any other value i want to undo the delete operation and get back the values in the child.
Is there any way to do it?
Regards,
Nigel.
Edited by: Nigel Thomas on Mar 29, 2012 5:07 AM
Edited by: Nigel Thomas on Mar 29, 2012 5:09 AMHi all,
I want to do a validation based on a SelectOneChoice List Value.
Based on which value in the select one choice is being selected, thedata from the VO should be DELETED or NOT-DELETED.
To do this I wrote a Managed Bean and the delete part is working fine if a particular value of the SelectOneChoice is selected.
Since the rows are deleted from the VO, after I change the SelectOneChoice value to the previous one I cannot retrieve the rows.
I thought of two ways:
1. As the Deleting option in the SelectOneChoice is selected the rows should be deleted from the VO and when reverted back to not-Deleting option the Rollback of Transaction method written in the Managed Bean should take place.
2. As the Deleting option is selected the data should be deleted from the VO and when reverted back to non-Deleting option, a query should be made from the Database.
The first plan was dropped because it is not VO-specific. If there are more than 1 VO in the page then whatever changes are made in the page will be reverted back as soon ad Rollback of transaction is done.
So the now i am left to go with the second plan.
Is there any way to implement the second plan?
If so...Will it compromise the performance of the application?
Or else, Is there any other way to implement my Use-Case ???
Regards,
Nigel. -
How to retrieve information from iCloud (earlier than the 3 most recent backups) ?
I had to restore my iPod 4th generation to factory settings and I'm trying to get all the information back from iCloud backup. The thing is that I had waited about a week or two(instead of right away) to try to put the information back into the iPod. And when I restored it again(for the second time) it only had the choice of retrieving informaiton from the 3 most recent iCloud backups but those were too recent for the information I wanted to get back. Is there any way, ANY WAY AT ALL that I can get access to earlier iCloud backups? Like maybe all the iCloud backups that have happened so far?
I've done some research and it doesn't say there is a way but there doesn't seem to be a lot of people with this problem. :( Please if you know a way, let me know.Welcome to the Apple Community.
Unfortunately, you cannot go back further than the three backups that you already have. -
How to retrieve information from entity beans?
Hi all!
I have a problem while trying to get information from entity beans. Here it goes:
There are two entity beans with 1:N relationship between them.
A FacadeSB is used to find a single record in one entity bean, using the findbyPrimaryKey method.
What is required now is to get information from the other entity bean matching the record found from the first entity bean.
to become more clear, the db schema is like that:
vehicle_table
vehicleid (vehicle_pkey)
name (type of vehicle i.e. car, bike, atv, etc)
brand_table
brandid (brand_pkey)
name (brand name e.g. ferrari)
vehicleid (foreign key to vehicle_table)
a FacadeSB gets the vehicle_table info and passes them to a servlet generated dropdown.
what is the best way to populate a brand dropdown based on the vehicle dropdown selection?
thanx in advance
I hope the problem definition is clear enough for you guys...thanx for the reply
i'm ok with the finder methods you suggested. my main concern in whether to create another FacadeSB to access the brand EJB. I don't believe that's the way to go on i.e. creating a session bean for every EJB created. Shall i use the VehicleFacadeSB to access brand EJB as well?
I can undestand that such an implementation would be a quick fix as well as not such a resources hungry hack but on the other hand, would it make any sense architecturally?
any suggestions?
Zac -
How to retrieve records from a database and display it in a jsp page.Help!!
Hello everyone ! im very new to this forum.Please help me to solve my problem
First i ll explain what is my requirement or needed.
Actually in my web page i have text box to enter start date and end date
and one list box to select the month .If user select or enter the dates in text box
accordingly the data from ms access database has to display in a jsp page.
Im using jsp and beans.
I tried returning ResultSet from bean but i get nothing display in my web page
instead it goes to error page (ErrorPage.jsp) which i handle in the jsp.
I tried many things but nothing work out please help me to attain a perfect
solution. I tried with my bean individually to check whether the result set has
values but i got NullPointerException . But the values which i passed or
available in the database.
I dint get any reply for my last post please reply atleast to this.
i get the date in the jsp page is by this way
int Year=Integer.parseInt(request.getParameter("year"));
int Month=Integer.parseInt(request.getParameter("month"));
int Day=Integer.parseInt(request.getParameter("day"));
String startdate=Day+"/"+Month+"/"+Year;
int Year1=Integer.parseInt(request.getParameter("year1"));
int Month1=Integer.parseInt(request.getParameter("month1"));
int Day1=Integer.parseInt(request.getParameter("day1"));
String enddate=Day1+"/"+Month1+"/"+Year1;But this to check my bean whether it return any result!
public void databaseConnection(String MTName,String startDate,String endDate)
try
java.text.SimpleDateFormat dateFormat=new java.text.SimpleDateFormat("dd/MM/yyyy");
java.util.Date fromDate=dateFormat.parse(startDate);
java.util.Date tillDate=dateFormat.parse(endDate);
java.sql.Date sqlFromDate=new java.sql.Date(fromDate.getTime());
java.sql.Date sqlTillDate=new java.sql.Date(tillDate.getTime());
String query1="select MTName,Date,MTLineCount from Main where MTName='"+MTName+"' and Date between '"+sqlFromDate+"' and '"+sqlTillDate+"' " ;
System.out.println(query1);
Class.forName(driver);
DriverManager.getConnection(url);
preparedStatement=connection.prepareStatement(query1);
preparedStatement.setString(1,"MTName");
preparedStatement.setDate(2,sqlFromDate);
preparedStatement.setDate(3,sqlTillDate);
resultSet=preparedStatement.executeQuery();
while(resultSet.next())
System.out.println(resultSet.getString(1));
System.out.println(resultSet.getDate(2));
System.out.println(resultSet.getInt(3));
catch (Exception e)
e.printStackTrace();
I Passed value from my main method is like thisl
databaseConnection("prasu","1/12/2005","31/12/2005");Please provide solutions or provide some sample codes!
Help!
Thanks in advance for repliesThanks for ur reply Mr.Rajasekhar
I tried as u said,
i tried without converting to sql date ,but still i din't get any results
java.text.SimpleDateFormat dateFormat=new java.text.SimpleDateFormat("dd/MM/yyyy");
java.util.Date fromDate=dateFormat.parse(startDate);
java.util.Date tillDate=dateFormat.parse(endDate);
String query1="select MTName,Date,MTLineCount from linecountdetails where mtname='"+MTName+"' and Date >='"+fromDate+"' and Date <='"+tillDate+"' " ;
System.out.println(query1);
//From main method
databaseConnection("prasu","1/12/2005","31/12/2005");I got the output as
---------- java ----------
select MTName,Date,MTLineCount from linecountdetails where mtname='prasu' and Date >='Thu Dec 01 00:00:00 GMT+05:30 2005' and Date <='Sat Dec 31 00:00:00 GMT+05:30 2005'
java.lang.NullPointerException
null
null
java.lang.NullPointerException
Output completed (4 sec consumed) - Normal TerminationThanks
Prasanna.B -
How to retrieve PARTNER_NUMBER from IBRELATION/Partner view (Install bases)
Hi Experts,
I've added an enhancement field in IBDETAIL/Header. Within the I-GETTER of this new field I need to retrieve PARTNER_NUMBER of a specific PARTNER_FCT (Partner Function), say '00000002'.
IBDETAIL is one of the views in the component IBMAIN, which I'm working on.
Thanks In Advance,
Regards,
NhlanhlaHi,
Try the following code:
Get Header partners
lr_ibpartnerset ?= lr_ibheader->get_related_entity( iv_relation_name = 'HeaderPartnerSet' ).
Get collection
if lr_ibpartnerset is BOUND.
lr_ibh_pcoll = lr_ibpartnerset->get_related_entities(
iv_relation_name = 'IBPartnerAll' ).
if lr_ibh_pcoll is BOUND.
lr_partner ?= lr_ibh_pcoll->get_first( ).
WHILE lr_partner is BOUND.
Check for Ship to party
if lr_partner->get_property_as_string( 'PARTNER_FCT' ) EQ '00000002'.
lr_partner->GET_PROPERTY_AS_VALUE( Exporting iv_attr_name = 'ZXXX'
Importing ev_result = l_partner ).
endif.
lr_partner ?= lr_ibh_pcoll->get_next( ).
Endwhile.
Regards,
S Reddy -
How to retrieve info from a MacOs Standard floppy?
How can I retrieve information from a MacOs Standard formatted floppy disk on Snow Lion?
I have this collection of old floppy disks that were formatted as MacOs Standard format back in the days. They do hold some files which I'd like to backup on a backup drive.
But, Snow Lion does not read MacOs Standard formatted disks apparently.
So, does anyone know how to retrieve information from MacOs Standard formatted floppy disks?
Thank you!This what I see in ML with my old SmartDisk VST (model# FDUSB-M) floppy drive:
Interesting observations:
1. I was able to add and remove files to the disk.
2. I was not able to erase the disk with Disk Utility. It returned an error.
3. Disk Utility did not offer the HFS+ format option, only FAT32 and ExFAT.
4. I could only find 1 floppy in my house so it could be partially defective. -
How do i retrieve information from the JSP into my SELECT statements?
I need to retrieve the information that is being entered into JSP page.. So that i can use them to do an SQL statement.. but im not very sure if my codes are correct.. Following are my codes.. Pls help.. thx
MyJSPPage.jsp
<jsp:useBean id="user" class="user.User" scope="session"/>
<form name="loanItem" method ="POST" action="user">
<input type="hidden" name="userID" value="<jsp:getProperty name="user" property="userID"/>">
<tr><td align=left height="34"> <b> <font size="4">Member ID:</font>
</b> </td>
<td height="34">
<jsp:getProperty name="user" property="userID"/></td>
</tr>
==================================================================================
MyManager.java --> this file is where all my SQL statements are ..
[l]String itemType = session.getParameter("itemType");[l] (--->> is how i retrieve info from the JSP page?)
if (itemType.equals("Book"))
String sqlQuery1 = "select loanDuration from ItemPolicy where itemType ='" + itemType+ "'";
System.out.println(sqlQuery1);
ItemPolicy itempolicy = null;
try {
db = new Database();
rs = db.readRequest(sqlQuery1);
if (rs != null && rs.next()) {
itempolicy = new ItemPolicy();
itempolicy.setLoanDuration(Integer.parseInt(rs.getString("loanDuration")));
db.close();
} catch (SQLException se) {
se.printStackTrace();
throw (new UserException("Unable to retrieve from Database!"));
} catch (Exception e) {
e.printStackTrace();
throw (new UserException("Unknow error encountered!"));
String dueDate = util.getDueDate(itempolicy.getLoanDuration());
else if (itemType.equals("Magazine"))
==================================================================================
Thanks in advance...you should change to request.getParameter("itemType").
or just System.out.print the itemType to see it got the value.
Hope it helps. -
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 get RMAN catalog information from Target database?
Hi,
How to get RMAN catalog information from Target database because i don't know about catalog database? is it possible?
ThanksIf you run RMAN backups of a target database using a Catalog schema in another database, the target is not aware of the catalog.
The RMAN backup script would have the connection identifier for the Catalog.
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how can i retrieve information from time machine if my computer has less storage capacity? How can I access data that is on my time machine but can not be copied to a computer with less storage capacity? I used to have 180 GB, now I have 128 GB.
Plug an external drive into the computer and use that to expand data onto.
http://pondini.org/TM/16.html -
Failure to retrieve data from the database (Vendor Code 6550)
I am having a trouble with two of the 6 reports that I have created. I am using Crystal XI and Oracle 10g. The underlying database object is a stored procedure that accepts as input a start time as a TIMESTAMP, an end time as a TIMESTAMP and a furnace number as a number. I have a cursor ref as a return parameter.
When I run the stored procedure in Oracle I get the selected records and can view them on the screen.
When I refresh data on the report in Crystal XI developer, the designer asks me for the start and end time and furnace number. When I input these values the report displays properly.
When I launch the report from my VB .NET 2005 application I am asked for the username and the password for the database (this is another problem I need to solve as this information I put into the program seems to be ignored in my program) then I receive the following failure message:
Failure to retrieve data from the database (Vendor Code 6550)
When I launch the other reports, they only ask me for the username and password then they display the proper data.
The main difference between my other reports and the two that are returning the above failure code is that the other reports are to either tables or views. The two that don't work are tied to stored procedures. I there any way that I can solve this problem or at least get more information?
Any help would be greatly appreciated. Let me know if you need any other information.I have a similar problem, the only difference is that the crystal report error is only thrown when I try to load the sub reports at my web application. When I deploy my report to the Web application the main report loads up fine but when I try to launch the sub reports from the main report it can no longer load.
But when I use the Crystal report developer I am able to load the main report and it's associated sub reports without any issues.
My issue only occurs when I try to load the sub report in the web application. The following sections shows how my reports look like both in my .NET web application and also at the Crystal Report Development IDE.
Failure: Loading my Reports from .NET Web Application
1) When I load from the web application I am able to load the main report as per the print screen below.
2) When I try to click on the hyper links to enter the sub reports I am now able to load them, both sub reports cannot load and will throw the same error "
Failed to retrieve data from the database. Details: [Database Vendor Code:
6550 ] Failed to retrieve data from the database. Details: [Database Vendor
Code: 6550 ] Failed to retrieve data from the database. Error in File OAWR3011A
{CEC8A94A-4490-4640-95FB-2739A679978B}.rpt: Failed to retrieve data from the
database. Details: [Database Vendor Code: 6550 ] "
Success: Loading my Reports from Crystal Report Development Tool
1) This is my Main Report Loaded from the Crystal Report Development Tool, the first two hyperlinked fields are links to my sub reports, step number 2 and number 3 shows my sub reports when I load it using Crystal Report Developer
2) Sub Report 1 Loaded Successfully, when I click on the fields in the first link
3) Sub Report 2 loaded successfully when I click the second field hyper link
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