The result set that contain 10 rows always

Hi all,
I'm wondering if there is some way to produce the result set of a query in 10 rows always, in other word i run a query and i want that the result set in 10 row even if the query dosn't return any row.
I need that row as a placeholder.
thanks
Francesco

Happened to be GUI developer and try to take advantage of SQL,
select * from (select rownum rn, e.* from emp e where rownum<11 and 1=2) e
right join (select rownum rn from dual connect by rownum<11) t
on t.rn=e.rn
RN
EMPNO ENAME
JOB
MGR HIREDATE
SAL
COMM
DEPTNO
RN
5
8
3
1
2
10
6
7
4
9
10 rows selected.
select * from (select rownum rn, e.* from emp e where rownum<11) e
right join (select rownum rn from dual connect by rownum<11) t
on t.rn=e.rn
RN
EMPNO ENAME
JOB
MGR HIREDATE
SAL
COMM
DEPTNO
RN
1
7369 SMITH
CLERK
7902 17-DEC-80
800
20
1
2
7499 ALLEN
SALESMAN
7698 20-FEB-81
1600
300
30
2
3
7521 WARD
SALESMAN
7698 22-FEB-81
1250
500
30
3
4
7566 JONES
MANAGER
7839 02-APR-81
2975
20
4
5
7654 MARTIN
SALESMAN
7698 28-SEP-81
1250
1400
30
5
6
7698 BLAKE
MANAGER
7839 01-MAY-81
2850
30
6
7
7782 CLARK
MANAGER
7839 09-JUN-81
2450
0
10
7
8
7788 SCOTT
ANALYST
7566 19-APR-87
3000
20
8
9
7839 KING
PRESIDENT
17-NOV-81
5000
0
10
9
10
7844 TURNER
SALESMAN
7698 08-SEP-81
1500
0
30
10
10 rows selected.

Similar Messages

How to hold the result set

     We have a GUI swing screen in which we have navigation buttons.
     when the user clicks the previous ,next, last,first buttons we have to show the records accordingly.
     The min. size of the database is around 1 million.and each row has 60 columns.
     Our approach is screen--->servlet-->ejb beans --->database.
     since the database is huge how to hold the values, and where, without affecting the performance.
     If we get the resultset it holds all the data.since the data size is huge,we are looking for a solution.The user may browse through the data ,edit the data and delete the data.
     we have to perform accordingly. Also, if, for example, user1 is seeing record no.1 & user 2 has modified record no.3 in the meanwhile, when user1 goes to record no.3, he should see the
     modified record. In short, the user should always see the latest values.
     please give us the best approach to solve this problem.
Also this is in a multi user environment.

It seems like you need to look at threads to update current values in the display and narrow the result set that you retrieve to match the criteria needed for display. You might consider making the method to change values a syncronized one.

OBIEE Answers does not display the result set of a report query

Hi,
We have a pivot table type of report in Oracle Business Intelligence Enterprise Edition v.10.1.3.3.2 Answers that has the following characteristics:
     3 Pages
     3 Sections , 4 Columns
     18363 Rows in the result set
As per the NQQuery.log, the query for this report executes successfully resulting in 18363 rows. However, nothing comes up in the display on Answers. Moreover, no error is reported. The instanceconfig.xml file has the following setting:
<PivotView>
     <CubeMaxRecords>30000</CubeMaxRecords>
     <CubeMaxPopulatedCells>300000</CubeMaxPopulatedCells>
</PivotView>
Even with these settings, Answers just returns a blank page - nothing is displayed in the name of the result set of the report query. Has anyone encountered this problem scenario before?
Any help is much appreciated.
Thanks,
Piyush

Hi Fiston / Pradeep,
Thanks for your inputs. A few points to note:
-> I am actually not getting any error message in answers or the NQQuery log. Moreover I am not getting any errors related to "query governor limit exceeding in cube generation" also.
-> I have other pivot table type of reports in the same repository that work fine. In fact the report which has this issue even works sometimes - what actually is happening is that if I alter the number of sections from 3 to 4, then the result set changes from 14755 Rows to 18363 Rows and as per the NQQuery.log in both cases the query completes successfully. However, when the result set has 14755 rows, I get to see the output in Answers; however when the result set is 18636 rows, the Answers screen just goes blank and does not show any output or error. This makes me believe that there is some parameter in instanceconfig or the NQSconfig file - I have tried a lot of changes but nothing works !
Any help is much appreciated.
Best Regards,
Piyush

How to add a dummy row in the result set of a SELECT statement.

Hello Everyone -
I have requirment to add a dummy row in the result set of a SELECT statement.
For e.g. lets say there is a table Payment having following colums:
Payment_id number
status varchar2(10)
amount number
payment_date date
so here is the data :-
Payment_id Status Amount payment_date
1 Applied 100 12/07/2008
2 Reversed 200 01/ 06/2009
3 Applied 300 01/ 07/2009
Here is my SQL
Select * form payment where payment_date >= 01/01/2009
Output will be
2 Reversed 200 01/ 06/2009
3 Applied 300 01/ 07/2009
My desired output is below
2 Reversed 200 01/ 06/2009
3 Applied 300 01/ 07/2009
2 Reversed -200 01/ 06/2009 ------(Dummy Row)
Thrid row here is the dummy row which I want to add when status is "Reversed"
I would be very thankful for any kind of help in this regard ...
Thanks,
Gaurav

Cartesion joining against a dummy table is a useful method of creating a dummy row:
with my_tab as (select 1 cust_id, 1 Payment_id, 'Applied' Status, 100 Amount, to_date('12/07/2008', 'mm/dd/yyyy') payment_date from dual union all
                select 1 cust_id, 2 Payment_id, 'Reversed' Status, 200 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
                select 1 cust_id, 3 Payment_id, 'Applied' Status, 300 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
                select 2 cust_id, 1 Payment_id, 'Applied' Status, 100 Amount, to_date('12/07/2008', 'mm/dd/yyyy') payment_date from dual union all
                select 2 cust_id, 2 Payment_id, 'Reversed' Status, 200 Amount, to_date('01/05/2009', 'mm/dd/yyyy') payment_date from dual union all
                select 2 cust_id, 3 Payment_id, 'Applied' Status, 300 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
                select 2 cust_id, 4 Payment_id, 'Reversed' Status, -400 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
                select 2 cust_id, 5 Payment_id, 'Applied' Status, 500 Amount, to_date('01/07/2009', 'mm/dd/yyyy') payment_date from dual),
                --- end of mimicking your table
      dummy as (select 'Reversed' col1, 1 rn from dual union all
                select 'Reversed' col1, 2 rn from dual)
select mt.cust_id,
       mt.payment_id,
       mt.status,
       decode(dummy.rn, 2, -1*mt.amount, mt.amount) amount,
       mt.payment_date
from   my_tab mt,
       dummy
where mt.status = dummy.col1 (+)
order by mt.cust_id, mt.payment_id, dummy.rn nulls first;
CUST_ID     PAYMENT_ID     STATUS     AMOUNT     PAYMENT_DATE
1     1     Applied     100     07/12/2008
1     2     Reversed     200     06/01/2009
1     2     Reversed     -200     06/01/2009
1     3     Applied     300     06/01/2009
2     1     Applied     100     07/12/2008
2     2     Reversed     200     05/01/2009
2     2     Reversed     -200     05/01/2009
2     3     Applied     300     06/01/2009
2     4     Reversed     -400     06/01/2009
2     4     Reversed     400     06/01/2009
2     5     Applied     500     07/01/2009Edited by: Boneist on 07-Jan-2009 23:10
NB. You may have to mess around with the ordering if that's not come back in the order you wanted. You didn't mention what the rules were for any expected ordering though, so I've made up my own *{;-)
Also, I added an identifier (cust_id) to differentiate between different sets of payments, since that's usually the case. Remove that if it's not applicable for your case.

Getting specific row of the result set.

table: employee
empno           number(20)
ssan           varchar2(9)
date_time_stamp date
My Sql gets all the empno where ssan and date_time_stamp are equal.
However I need previous row from max(empno) where ssan & date_time_stamp are equal.
For eg:
empno     ssan           date_time_stamp
100     123456789     01-FEB-2004
101     000000000     02-FEB-2004
102     123456789     01-FEB-2004
103     123456789     01-FEB-2004
105     123456789     01-FEB-2004
I need row with empno = 103.
My current sql fetches all rows for particular ssan where ssan and date time stamp are equal that fetches all empno for particular ssan and date time stamp. I want the max(empno) -1 (previous row of the result set).
Here is my sql:
select empno,ssan,date_time_stamp
from employee e
where date_time_stamp in (select date_time_stamp from employee where e.ssan = ssan)
order by empno,ssan;
The above sql will fetch
empno     ssan           date_time_stamp
100     123456789     01-FEB-2004
102     123456789     01-FEB-2004
103     123456789     01-FEB-2004 ---> I need this row, previous row from max(empno) where ssan and date time
stamp are matching.
105     123456789     01-FEB-2004
101     000000000     02-FEB-2004

If I understand correctly, you want the second highest empno for each unique combination of ssan and date_time_stamp. If so, given
SQL> SELECT * FROM employee;
     EMPNO SSAN      DATE_TIME_S
       102 123456789 01-feb-2004
       103 123456789 01-feb-2004
       105 123456789 01-feb-2004
       100 123456678 01-feb-2004
       102 123456678 01-feb-2004
       103 123456678 01-feb-2004
       101 000000000 02-feb-2004
       105 123456678 01-feb-2004
       100 123456678 02-feb-2004
       102 123456678 02-feb-2004
       103 123456678 02-feb-2004
       105 123456678 02-feb-2004
       100 123456789 01-feb-2004Then something like this should do it.
SQL> SELECT empno,ssan,date_time_stamp
2 FROM (SELECT empno,ssan,date_time_stamp,
3               RANK() OVER (PARTITION BY ssan,date_time_stamp
4                            ORDER BY empno DESC) rk
5        FROM employee)
6* WHERE rk = 2;
     EMPNO SSAN      DATE_TIME_S
       103 123456678 01-feb-2004
       103 123456678 02-feb-2004
       103 123456789 01-feb-2004HTH
John

How to send email using pl/sql containing the result set as the msg body

Hi.. im using Pl/SQL code to send emails to the users from a dataset that is obtained in a databse table. i have used utl_smtp commands to establish the connection with the smtp mail server. im stuck at the logic when i have to include the message body which is actually the result set of a table.. For instance
IF (p_message = 0) THEN
UTL_SMTP.write_data(l_mail_conn, 'There is no mismatch between the codes' || UTL_TCP.crlf);
ELSE
UTL_SMTP.write_data(l_mail_conn, 'The missing codes are ' || UTL_TCP.crlf);
for s in (select * from temp)
loop
UTL_SMTP.write_data(l_mail_conn, ' ' ||s || UTL_TCP.crlf);
end loop;
END IF;
UTL_SMTP.close_data(l_mail_conn);
UTL_SMTP.quit(l_mail_conn);
END;
***p_message is a prameter passed to this procedure..
Can i obtain the result in the form i have it in my table. which has three columns. I want to display the three columns as it is with teh records. ?

this is not related about this forum but you can use below,
CREATE OR REPLACE PROCEDURE SEND_MAIL (subject varchar2,mail_from varchar2, mail_to varchar2,mail_msg varchar2)
IS
mail_host varchar2(30):='XXXXX';
mail_conn utl_smtp.connection;
tz_offset number:=0;
str varchar2(32000);
BEGIN
begin
select to_number(replace(dbtimezone,':00'))/24 into tz_offset from dual;
exception
when others then
null;
end;
mail_conn:=utl_smtp.open_connection(mail_host, 25);
utl_smtp.helo(mail_conn,mail_host);
utl_smtp.mail(mail_conn,'[email protected]');
utl_smtp.rcpt(mail_conn,mail_to);
utl_smtp.open_data(mail_conn);
utl_smtp.write_data(mail_conn,'Date: '||to_char(sysdate-tz_offset,'dd mon yy hh24:mi:ss')||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,'From: '|| mail_from ||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,'To: "'|| mail_to ||'" <'||mail_to||'>'||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,'Subject: '||subject||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,utl_tcp.crlf);
utl_smtp.write_data(mail_conn,replace_turkish_chars(mail_msg)||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,utl_tcp.crlf);
utl_smtp.close_data(mail_conn);
utl_smtp.quit(mail_conn);
END;
Edited by: odilibrary.com on Jun 12, 2012 5:26 PM

How to exclude the XML declaration from each row of the result set?

Hi,
I have a table with an XMLTYPE column and would like to SELECT a set of rows. How can I exclude the XML declaration from each row in the result set? My query currently looks like this, I'm executing it through Spring JDBC:
SELECT XMLSerialize(CONTENT t1.xmltext) FROM myschema.event t1 WHERE XMLEXISTS('$e/Event' PASSING XMLTEXT AS "e") ORDER BY t1.time DESC
After selecting, in my application I convert each row into a String and concatenate all rows into one big string in order to parse it into a DOM model. I get a parser exception (org.xml.sax.SAXParseException: The processing instruction target matching "[xX][mM][lL]" is not allowed) because there are multiple XML declarations in my big string. Of course, I could manually check the String of each row whether it starts with the XML declaration, but it would be nicer if I could instruct the DB not to add it in the first place. Is there a way?
Thanks!
-- Daniela

Hi,
A couple of options I can think of :
SELECT XMLSerialize(CONTENT
XMLtransform(t1.xmltext,
xmltype('<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes"/>
<xsl:template match="/"><xsl:copy-of select="*"/></xsl:template>
</xsl:stylesheet>')
FROM myschema.event t1
WHERE XMLEXISTS('$e/Event' PASSING XMLTEXT AS "e")
ORDER BY t1.time DESC
;or simply,
SELECT XMLSerialize(CONTENT
extract(t1.xmltext,'/')
FROM myschema.event t1
WHERE XMLEXISTS('$e/Event' PASSING XMLTEXT AS "e")
ORDER BY t1.time DESC
;

Is column visibility based on the first page of the result set or the entire result set?

I have tried, in vain, to play with the column visibility expression in my report. So where my Business Unit is "MC" or "FM", then I want to display column "HCFA Number"...otherwise hide it. If I run strictly for "MC"
it works! If I run simply for "CO" it works! And doesn't show! But if I combine "CO" and "MC", it is hidden and I would expect it to be visible since "MC" is part of my entire report.
Here's the expression I came up with for Column Visibility...
=IIf((Fields!BUSINESS_UNIT.Value = "MC") OR
(Fields!BUSINESS_UNIT.Value = "FM"),FALSE,TRUE)
Am I missing something here or just being dense late on a Friday???
Thanks for your review and am hopeful for a reply.

Hi ITBobbyP,
It seems you have add parameter based on the "Business Unit" which is multiple values and when you select the "CO,MC" the entire column "HCFA Number" is hide, but what you want is to hide the CO related "HCFA Number"
and show the MC related "HCFA Number", right?
The expression you are using to show/hide the column visibility will based on the current filtered entire result set. That is mean the entire column "HCFA Number" will be show when the result set contains "MC" or "FM"
or both, otherwise, it will always hide.
In your scenario, you can set the row visibility using the expression and you will get the result like below:
You can set the visibility of the textbox "[HCFANumber]", but the CO related "HCFANumber" will be blank:
If I have some misunderstanding, please try to provide more details information about the expect result you want.
Regards,
Vicky Liu
Vicky Liu
TechNet Community Support

How to return the result set of multiple select statements as one result set?

Hi All,
I have multiple select statements in my stored procedure that I want to return as one result set
for instance
select id from tableA
union
select name from table b
but union will not work because the result sets datatypes are not identical so how to go about this ?
Thanks

You have to CAST or CONVERT (or implicitly convert) the columns to the same datatype. You must find a datatype that both columns can be converted to without error. In your example I'm guessing id is an int and name is a varchar or nvarchar.
Since you didn't convert the datatypes, SQL will use its data precedence rules and attempt to convert name to an int. If any row contains a row that has a value in name that cannot be converted to an int, you will get an error. The solution is
to force SQL to convert the int to varchar. So you want something like
select cast(id as varchar(12)) from tableA
union
select name from tableb
If the datatypes are something other that int or varchar, you must find a compatable datatype and then convert one (or both) of the columns to that datatype.
Tom

How to get the result set in batches

I have a query which results into large data. This data i want to display in a group of 20. After every 20 records i want to add header and footer to it.
Is it possible to get the result set data into batch of 20 ? means can i specify start and end index of query ?
regards
Manisha

What I am saying is that a big query with lots of
joins will probably be slow, and as such would be a
ripe candidate for batching the responses, if it were
not possible to speed/optimize it. Batching is nice
to look at for the user, but is not a solution for
performance problems. In essence it is irrelevant
that it adds a little performance deficit, as it
appears to be running a lot quicker, and gives more
feedback to the user.Then let me say it again....
- "Join" is a term that applies to a method of doing queries in the database....
- Query 1 which uses a join and returns 15 rows
- Query 2 which does not use a join and returns 1500 rows.
Given the above then Query 1 will provide better overall performance for the system than Query 2 in a properly configured database.
If it doesn't then the database is not set up correctly.
And again this will be irrespective of whether the query is scrollable or not.

Statement.close() Not closing the Result set

Hi all,
I have the following code which invokes a procedure in Oracle database
public static callProcedure(Connection connection,String procedure){
ResultSet resultSet = null;
CallableStatement callableStatement = null;
try {
callableStatement = connection.prepareCall(procedure);
callableStatement.registerOutParameter(1,OracleTypes.CURSOR);
callableStatement.execute();
resultSet =((OracleCallableStatement)callableStatement).getCursor(1);
} catch (Exception exception) {
exception.printStackTrace();
} finally {
try {
callableStatement.close();
} catch (SQLException sqlException) {
sqlException.printStackTrace()
return resultSet;
Ideally if i try to iterate through the result set which is returned then it should give me resultset closed as i am closing the resultset. But this is not happening.
Please anybody can explain the isue

Hi,
That is not easy to explain, I might take a guess and say that a statement cache is being used therefore the statement is not actually being closed.
I always close the reultset then the statement so wouldn't notice this behaviour.
Why are you returning a resultset anyway? If you really need to do this I would suggest using a disconnected resultset:
OracleCachedRowSet ocrs = new OracleCachedRowSet();
ocrs.populate(resultSet);
return ocrs;

JSP Servlet and convert the result set of an SQL Query To XML file

Hi all
I have a problem to export my SQL query is resulty into an XML file I had fixed my servlet and JSP so that i can display all the records into my database and that the goal .Now I want to get the result set into JSP so that i can create an XML file from that result set from the jsp code.
thisis my servlet which will call the jsp page and the jsp just behind it.
//this is the servlet
import java.io.*;
import java.lang.reflect.Array;
import java.sql.*;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.*;
import javax.sql.*;
public *class *Campaign *extends *HttpServlet
*private* *final* *static* Logger +log+ = Logger.+getLogger+(Campaign.*class*.getName());
*private* *final* *static* String +DATASOURCE_NAME+ = "jdbc/SampleDB";
*private* DataSource _dataSource;
*public* *void* setDataSource(DataSource dataSource)
_dataSource = dataSource;
*public* DataSource getDataSource()
*return* _dataSource;
*public* *void* init()
*throws* ServletException
*if* (_dataSource == *null*) {
*try* {
Context env = (Context) *new* InitialContext().lookup("java:comp/env");
_dataSource = (DataSource) env.lookup(+DATASOURCE_NAME+);
*if* (_dataSource == *null*)
*throw* *new* ServletException("`" + +DATASOURCE_NAME+ + "' is an unknown DataSource");
} *catch* (NamingException e) {
*throw* *new* ServletException(e);
protected *void *doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
Connection conn = *null*;
*try* {
conn = getDataSource().getConnection();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("select post_id,comments,postname from app.posts");
// out.println("Le résultat :<br>");
ArrayList <String> Lescomments= *new* ArrayList<String>();
ArrayList <String> Lesidentifiant = *new* ArrayList<String>();
ArrayList <String> Lesnoms = *new* ArrayList <String>();
*while* (rs.next()) {
Lescomments.add(rs.getString("comments"));
request.setAttribute("comments",Lescomments);
Lesidentifiant.add(rs.getString("post_id"));
request.setAttribute("id",Lesidentifiant);
Lesnoms.add(rs.getString("postname"));
request.setAttribute("nom",Lesnoms);
rs.close();
stmt.close();
*catch* (SQLException e) {
*finally* {
*try* {
*if* (conn != *null*)
conn.close();
*catch* (SQLException e) {
// les paramètres sont corrects - on envoie la page réponse
getServletContext().getRequestDispatcher("/Campaign.jsp").forward(request,response);
}///end of servlet
}///this is the jsp page called
<%@ page import="java.util.ArrayList" %>
<%
// on récupère les données
ArrayList nom=(ArrayList)request.getAttribute("nom");
ArrayList id=(ArrayList)request.getAttribute("id");
ArrayList comments=(ArrayList) request.getAttribute("comments");
%>
<html>
<head>
<title></title>
</head>
<body>
Liste des campagnes here i will create the xml file the problem is to display all rows
<hr>
<table>
<tr>
</tr>
<tr>
<td>Comment</td>
<td>
<%
for( int i=0;i<comments.size();i++){
out.print("<li>" + (String) comments.get(i) + "</li>\n");
}//for
%>
</tr>
<tr>
<td>nom</td>
<td>
<%
for( int i=0;i<nom.size();i++){
out.print("<li>" + (String) nom.get(i) + "</li>\n");
}//for
%>
</tr>
<tr>
<td>id</td>
<td>
<%
for( int i=0;i<id.size();i++){
out.print("<li>" + (String) id.get(i) + "</li>\n");
}//for
%>
</tr>
</table>
</body>
</html>
This is how i used to create an XML file in a JSP page only without JSP/SERVLET concept:
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<%
// Identify a carriage return character for each output line
int iLf = 10;
char cLf = (*char*)iLf;
// Create a new empty binary file, which will content XML output
File outputFile = *new* File("C:\\Users\\user\\workspace1\\demo\\WebContent\\YourFileName.xml");
//outputFile.createNewFile();
FileWriter outfile = *new* FileWriter(outputFile);
// the header for XML file
outfile.write("<?xml version='1.0' encoding='ISO-8859-1'?>"+cLf);
try {
// Define connection string and make a connection to database
Connection conn = DriverManager.getConnection("jdbc:derby://localhost:1527/SAMPLE","app","app");
Statement stat = conn.createStatement();
// Create a recordset
ResultSet rset = stat.executeQuery("Select * From posts");
// Expecting at least one record
*if*( !rset.next() ) {
*throw* *new* IllegalArgumentException("No data found for the posts table");
outfile.write("<Table>"+cLf);
// Parse our recordset
// Parse our recordset
*while*(rset.next()) {
outfile.write("<posts>"+cLf);
outfile.write("<postname>" + rset.getString("postname") +"</postname>"+cLf);
outfile.write("<comments>" + rset.getString("comments") +"</comments>"+cLf);
outfile.write("</posts>"+cLf);
outfile.write("</Table>"+cLf);
// Everything must be closed
rset.close();
stat.close();
conn.close();
outfile.close();
catch( Exception er ) {
%>

Please state your problem that you are having more clearly so we can help.
I looked at your code I here are a few things you might consider:
It looks like you are putting freely typed-in comments from end-users into an xml document.
The problem with this is that the user may enter characters in his text that have special meaning
to xml and will have to be escaped correctly. Some of these characters are less than character, greater than character and ampersand character.
You may also have a similiar problem displaying them on your JSP page since there may be special characters that JSP has.
You will have to read up on how to deal with these special characters (I dont remember what the rules are). I seem to recall
if you use CDATA in your xml, you dont have to deal with those characters (I may be wrong).
When you finish writing your code, test it by entering all keyboard characters to make sure they are processed, stored in the database,
and re-displayed correctly.
Also, it looks like you are putting business logic in your JSP page (creating an xml file).
The JSP page is for displaying data ONLY and submitting back to a servlet. Put all your business logic in the servlet. Putting business logic in JSP is considered bad coding and will cause you many hours of headache trying to debug it. Also note: java scriptlets in a JSP page are only run when the JSP page is compiled into a servlet by java. It does not run after its compiled and therefore you cant call java functions after the JSP page is displayed to the client.

Why to need close the result set and statement

why to need close the result set and statement

It's best to explicitly close every ResultSet, Statement, and Connection in the narrowest scope possible.
These should be closed in a finally block.
Since each close() method throws SQLException, each one should be in an individual try/catch block to ensure that a failure to close one won't ruin the chances for all the others.
You can capture this in one nice utility class, like this:
package db;
import java.sql.*;
import java.util.ArrayList;
import java.util.Map;
import java.util.LinkedHashMap;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
* Created by IntelliJ IDEA.
* User: MD87020
* Date: Feb 16, 2005
* Time: 8:42:19 PM
* To change this template use File | Settings | File Templates.
public class DatabaseUtils
     * Logger for DatabaseUtils
    private static final Log logger = LogFactory.getLog(DatabaseUtils.class);
    /** Private default ctor to prevent subclassing and instantiation */
    private DatabaseUtils() {}
     * Close a connection
     * @param connection to close
    public static void close(Connection connection)
        try
            if ((connection != null) && !connection.isClosed())
                connection.close();
        catch (SQLException e)
            logger.error("Could not close connection", e);
     * Close a statement
     * @param statement to close
    public static void close(Statement statement)
        try
            if (statement != null)
                statement.close();
        catch (SQLException e)
            logger.error("Could not close statement", e);
     * Close a result set
     * @param rs to close
    public static void close(ResultSet rs)
        try
            if (rs != null)
                rs.close();
        catch (SQLException e)
            logger.error("Could not close result set", e);
     * Close both a connection and statement
     * @param connection to close
     * @param statement to close
    public static void close(Connection connection, Statement statement)
        close(statement);
        close(connection);
     * Close a connection, statement, and result set
     * @param connection to close
     * @param statement to close
     * @param rs to close
    public static void close(Connection connection,
                             Statement statement,
                             ResultSet rs)
        close(rs);
        close(statement);
        close(connection);
     * Helper method that maps a ResultSet into a map of columns
     * @param rs ResultSet
     * @return map of lists, one per column, with column name as the key
     * @throws SQLException if the connection fails
    public static final Map toMap(ResultSet rs) throws SQLException
        List wantedColumnNames = getColumnNames(rs);
        return toMap(rs, wantedColumnNames);
     * Helper method that maps a ResultSet into a map of column lists
     * @param rs ResultSet
     * @param wantedColumnNames of columns names to include in the result map
     * @return map of lists, one per column, with column name as the key
     * @throws SQLException if the connection fails
    public static final Map toMap(ResultSet rs, List wantedColumnNames)
        throws SQLException
        // Set up the map of columns
        int numWantedColumns    = wantedColumnNames.size();
        Map columns             = new LinkedHashMap(numWantedColumns);
        for (int i = 0; i < numWantedColumns; ++i)
            List columnValues   = new ArrayList();
            columns.put(wantedColumnNames.get(i), columnValues);
        while (rs.next())
            for (int i = 0; i < numWantedColumns; ++i)
                String columnName   = (String)wantedColumnNames.get(i);
                Object value        = rs.getObject(columnName);
                List columnValues   = (List)columns.get(columnName);
                columnValues.add(value);
                columns.put(columnName, columnValues);
        return columns;
     * Helper method that converts a ResultSet into a list of maps, one per row
     * @param rs ResultSet
     * @return list of maps, one per row, with column name as the key
     * @throws SQLException if the connection fails
    public static final List toList(ResultSet rs) throws SQLException
        List wantedColumnNames = getColumnNames(rs);
        return toList(rs, wantedColumnNames);
     * Helper method that maps a ResultSet into a list of maps, one per row
     * @param rs ResultSet
     * @param wantedColumnNames of columns names to include in the result map
     * @return list of maps, one per column row, with column names as keys
     * @throws SQLException if the connection fails
    public static final List toList(ResultSet rs, List wantedColumnNames)
        throws SQLException
        List rows = new ArrayList();
        int numWantedColumns = wantedColumnNames.size();
        while (rs.next())
            Map row = new LinkedHashMap();
            for (int i = 0; i < numWantedColumns; ++i)
                String columnName   = (String)wantedColumnNames.get(i);
                Object value = rs.getObject(columnName);
                row.put(columnName, value);
            rows.add(row);
        return rows;
      * Return all column names as a list of strings
      * @param rs query result set
      * @return list of column name strings
      * @throws SQLException if the query fails
    public static final List getColumnNames(ResultSet rs) throws SQLException
        ResultSetMetaData meta = rs.getMetaData();
        int numColumns = meta.getColumnCount();
        List columnNames = new ArrayList(numColumns);
        for (int i = 1; i <= numColumns; ++i)
            columnNames.add(meta.getColumnName(i));
        return columnNames;
}Anybody who lets the GC or timeouts or sheer luck handle their resource recovery for them is a hack and gets what they deserve.
Do a search on problems with Oracle cursors being exhausted and learn what the root cause is. That should convince you.
scsi-boy is 100% correct.
%

How to Colour the fields in the Result Set of the query

Hi all,
I am having a requirement wher the user want to view the queries results with some colour to the char in the result set.
suppose customer is the row he want to view some customers with one color and some with different color.
Is it possible in Bi.
If so Plz let me know
Regards

Hi Priya,
for the macro thing, you will have to create a workbook and store your query into it, because macros are attached to only workbooks and not queries.
in the workbook screen (i.e. excel), go to tools --> Macro --> Visual Basic Editor. or simply press Alt + F11. this will take you to macro editor screen.
you can use code that may look something like below to color the columns, you can also give constant column if they are fixed.
sub ColorColumns(rngTarget As Range, _
    intColor As Integer)
Dim c As Long
    With rngTarget
        .Interior.ColorIndex = intColour
        Next c
    End With
End Sub
You will find some easy and short snippets for this.
Regards,
Purvang

Result Set only returning one row...

When I run the following query in my program, I only get one row.
SELECT * FROM (SELECT * FROM ul_common_log_event WHERE application_name = 'Configuration' ORDER BY cle_id DESC) WHERE ROWNUM <= 500;
However when I run it in TOAD, I get all the rows I am looking for.
Here's my java
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(query);
My record set only contain one row. I am using Oracle 9 OCI driver BTW.
Any ideas? Thanks!

Good thinking. That was the first thing I tried. That was not the problem. It turns out that I was stomping my rs object in another method. Problem resolved!
Thanks for the reply!

The result set that contain 10 rows always

Similar Messages

Maybe you are looking for