Inserting row in the result set

Hi
need to insert a row in resultset when previous row typ=c and next row typ=p then need to insert one row in between typ c and p with typ =s see the #temp_result table for result expected
--drop table temp1
--drop table temp1_result
--presently data:-
create table temp1
(id int,
ord int,
typ varchar(2),
dt date)
insert into temp1 values (101, 1, 'c', '2001-10-01')
insert into temp1 values (101, 2, 'p', '2001-11-11')
insert into temp1 values (102, 1, 'c', '2002-10-01')
insert into temp1 values (102, 2, 'p', '2002-11-01')
insert into temp1 values (102, 3, 'p', '2002-12-01')
insert into temp1 values (103, 1, 'c', '2003-10-01')
insert into temp1 values (103, 2, 'p', '2003-11-01')
insert into temp1 values (104, 1, 'c', '2004-10-01')
insert into temp1 values (104, 2, 'c', '2004-11-01')
insert into temp1 values (104, 3, 'p', '2004-12-01')
insert into temp1 values (105, 1, 'c', '2005-10-01')
insert into temp1 values (105, 2, 'p', '2005-11-01')
insert into temp1 values (105, 3, 'c', '2005-12-01')
insert into temp1 values (106, 1, 'c', '2006-08-01')
insert into temp1 values (106, 2, 'p', '2006-09-01')
insert into temp1 values (106, 3, 'c', '2006-10-01')
insert into temp1 values (106, 4, 'p', '2006-11-01')
insert into temp1 values (106, 5, 'p', '2006-12-01')
select * from temp1
order by id, ord
--result expected:-
create table temp1_result
(id int,
ord int,
typ varchar(2),
dt date)
insert into temp1_result values (101, 1, 'c', '2001-10-01')
insert into temp1_result values (101, 2, 's', '')
insert into temp1_result values (101, 3, 'p', '2001-11-11')
insert into temp1_result values (102, 1, 'c', '2002-10-01')
insert into temp1_result values (102, 2, 's', '')
insert into temp1_result values (102, 3, 'p', '2002-11-01')
insert into temp1_result values (102, 4, 'p', '2002-12-01')
insert into temp1_result values (103, 1, 'c', '2003-10-01')
insert into temp1_result values (103, 2, 's', '')
insert into temp1_result values (103, 3, 'p', '2003-11-01')
insert into temp1_result values (104, 1, 'c', '2004-10-01')
insert into temp1_result values (104, 2, 'c', '2004-11-01')
insert into temp1_result values (104, 3, 's', '')
insert into temp1_result values (104, 4, 'p', '2004-12-01')
insert into temp1_result values (105, 1, 'c', '2005-10-01')
insert into temp1_result values (105, 2, 's', '')
insert into temp1_result values (105, 3, 'p', '2005-11-01')
insert into temp1_result values (105, 4, 'c', '2005-12-01')
insert into temp1_result values (106, 1, 'c', '2006-08-01')
insert into temp1_result values (106, 2, 's', '')
insert into temp1_result values (106, 3, 'p', '2006-09-01')
insert into temp1_result values (106, 4, 'c', '2006-10-01')
insert into temp1_result values (106, 5, 's', '')
insert into temp1_result values (106, 6, 'p', '2006-11-01')
insert into temp1_result values (106, 7, 'p', '2006-12-01')
select * from temp1_resultregards
Edited by: @2**** on 31-Jan-2012 06:48

Well, in an Oracle database, something like this...
SQL> ed
Wrote file afiedt.buf
1 with temp as (select 101 as id, 1 as ord, 'c' as typ, date '2001-10-01' as dt from dual union all
2                select 101, 2, 'p', date '2001-11-11' from dual union all
3                select 102, 1, 'c', date '2002-10-01' from dual union all
4                select 102, 2, 'p', date '2002-11-01' from dual union all
5                select 102, 3, 'p', date '2002-12-01' from dual union all
6                select 103, 1, 'c', date '2003-10-01' from dual union all
7                select 103, 2, 'p', date '2003-11-01' from dual union all
8                select 104, 1, 'c', date '2004-10-01' from dual union all
9                select 104, 2, 'c', date '2004-11-01' from dual union all
10                select 104, 3, 'p', date '2004-12-01' from dual union all
11                select 105, 1, 'c', date '2005-10-01' from dual union all
12                select 105, 2, 'p', date '2005-11-01' from dual union all
13                select 105, 3, 'c', date '2005-12-01' from dual union all
14                select 106, 1, 'c', date '2006-08-01' from dual union all
15                select 106, 2, 'p', date '2006-09-01' from dual union all
16                select 106, 3, 'c', date '2006-10-01' from dual union all
17                select 106, 4, 'p', date '2006-11-01' from dual union all
18                select 106, 5, 'p', date '2006-12-01' from dual)
19 --
20 -- end of test data
21 --
22 select id
23        ,row_number() over (partition by id order by ord, typ) as ord
24        ,typ
25        ,dt
26 from (
27        select id
28              ,ord
29              ,case when rn = 2 and add_typ = 's' then add_typ else typ end as typ
30              ,case when rn = 1 then dt else null end as dt
31        from (
32              select t.id, t.ord, t.typ, t.dt
33                    ,case when typ = 'c' and lead(typ) over (partition by id order by ord) = 'p' then 's'
34                     else null end as add_typ
35              from   temp t
36             ) x
37             cross join (select rownum rn from dual connect by rownum <= 2)
38        where not (rn = 2 and add_typ is null)
39       )
40* order by id, ord
SQL> /
        ID        ORD T DT
       101          1 c 01-OCT-2001 00:00:00
       101          2 s
       101          3 p 11-NOV-2001 00:00:00
       102          1 c 01-OCT-2002 00:00:00
       102          2 s
       102          3 p 01-NOV-2002 00:00:00
       102          4 p 01-DEC-2002 00:00:00
       103          1 c 01-OCT-2003 00:00:00
       103          2 s
       103          3 p 01-NOV-2003 00:00:00
       104          1 c 01-OCT-2004 00:00:00
       104          2 c 01-NOV-2004 00:00:00
       104          3 s
       104          4 p 01-DEC-2004 00:00:00
       105          1 c 01-OCT-2005 00:00:00
       105          2 s
       105          3 p 01-NOV-2005 00:00:00
       105          4 c 01-DEC-2005 00:00:00
       106          1 c 01-AUG-2006 00:00:00
       106          2 s
       106          3 p 01-SEP-2006 00:00:00
       106          4 c 01-OCT-2006 00:00:00
       106          5 s
       106          6 p 01-NOV-2006 00:00:00
       106          7 p 01-DEC-2006 00:00:00
25 rows selected.

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Hi Experts,
We have a report in which the user is interested to see only the result rows and I need to HIDE the characteristics in the rows. I was successfull in doing the same for Key figures in columns using "Calculate single value as suppress result". But I am not finding a way out to hide the characteristics in the rows.
If I move the characteristics in rows to Free characteristics, the result row is not getting dispalyed. Also, the characteristics are used dynamically by the formulae in columns and hence i cant remove these characteristics from the query. . The user wants the query to contain only one characteristic in the row and the result row for the key figures in columns. The report currently displays Invoice level data for each customer and this needs to be eliminated and it should display the summarised data for every customer. Please suggest how this can be accomplished
Regards,
Kavitha

Moving the char to free char will show the equivalent of result.
Your issue likely is that this breaks the calculations since you do want the calculations done at detail level.
To achieve this, move your char to free char (say it is 0CUSTOMER).
For the CKF/Formula, go to aggregation tab, set the exception aggregation as Total (or whatever it was in standard behavior) and specify reference characteristic (in this case 0CUSTOMER), also check the 'Before aggregation' if you have that checkbox there.
This will ensure the calculation is done at detail level even though the char is not included in the rows.
If you have multiple chars to be moved to free char but included in detailed calculation, you will need to build cascading CKFs (CKF1 with ref char1, CKF2 eq to CKF1 with exception aggr on ref char2...and so on).
Added:
I understand you do want 0CUSTOMER in there, but something else (let us say 0DOCNO) removed. Use 0DOCNO in place of 0CUSTOMER in the case described above.
Edited by: Ajay Das on Aug 5, 2009 8:57 AM

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

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.

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.

Inserting row in the result set

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