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.

Similar Messages

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.

How to Store the result sets of a stored procedure that is returning more that one result set in two different table ?

Hi Experts,
I have on stored procedure which returns mote than one resultset i want that to store in two different temp table how can achieve this in SQL server.
following is the stored procedure and table that i need to create.
create procedure GetData as begin select * from Empselect * from Deptend
create table #tmp1 (Ddeptid int, deptname varchar(500),Location varchar(100))
Insert into #tmp1 (Ddeptid , deptname ,Location )
exec GetData
create table #tmp (empid int , ename varchar(500),DeptId int , salary int)
Insert into #tmp (empId,ename,deptId,salary)
exec GetData
Niraj Sevalkar

You cant get two resultsets out of SP like this. The workaround is to merge and bring the resultsets.
For this number of columns as well as corresponding datatypes have to be compatible. Also you will need one additional column which indicates resultset value. Then use this as filter to get your desired resultset out
create procedure GetData as
begin
select 'resultset1' as Cat,*,.. N columns from Emp
union all
select 'resultset2' as Cat,*,.. N columns from Dept
end
create table #tmp1 (Ddeptid int, deptname varchar(500),Location varchar(100))
Insert into #tmp1 (Ddeptid , deptname ,Location )
Select column1,column2,column3
from OPENROWSET('SQLOLEDB','Data Source=Server_name;Trusted_Connection=yes;
Integrated Security=SSPI','Execute yourdb..GetData')
WHERE Cat = 'resultset1'
create table #tmp (empid int , ename varchar(500),DeptId int , salary int)
Insert into #tmp (empId,ename,deptId,salary)
Select column1,column2,column3, column4
from OPENROWSET('SQLOLEDB','Data Source=Server_name;Trusted_Connection=yes;
Integrated Security=SSPI','Execute yourdb..GetData')
WHERE Cat = 'resultset2'
also see
http://sqlblogcasts.com/blogs/madhivanan/archive/2007/11/26/select-columns-from-exec-procedure-name-is-this-possible.aspx
Another method is to populate table with relevant resultset within procedure itself and then select from the table directly outside.
Please Mark This As Answer if it solved your issue
Please Vote This As Helpful if it helps to solve your issue
Visakh
My Wiki User Page
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My Personal Blog
My Facebook Page

Saving the result set in a Search page

Hi ,
We have a manual search page where the results are displayed in the form of 10 columns. The first 5 are read only fields whereas rest 5 are editable checkboxes.
There is no Query region created in our page.
Suppose, fields a, b, c are search parameters and the results are as :
| A | B | C| D |E | F | G | H | I | J |
1
2
3
4
5
6
7
7 records are retrieved. Columns A to E are read only text fields whereas columns F to J are check boxes. The user can update the checkboxes. We have a Save button below the result set region. This button on being pressed invokes a stored PL/SQL Procedure which does some validations on the result set so obtained.
Our requirement is to dump all the 7 records (after the modifications are made to any number of result records) into a temporary table . The procedure will then pick the records from this temporary table and do the required validations.
Question is :
1. How to store the result set so obtained into a table after some (or all) records are modified once Save is pressed ?
We do not have any EO created in our page. The VO for obtaining the Result set is a combination of many tables.
Any help would be greatly appreciated.
Thanks,
Neha

River_Plate wrote:
root cause
java.lang.NullPointerException
org.apache.jsp.tablasUF_jsp._jspService(tablasUF_jsp.java:68)Do you understand anyway when a NullPointerException would be thrown? Those kind of RuntimeExceptions are basic Java knowledge.
If an object is null while you want to access it, then a NPE would be thrown. Check the line of the cause which objects could be null and fix it accordingly.

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
;

How to get Implicit Dimensions/Dimension Values in the result set?

Hi All,
How does endeca return implicitly selected dimensions in the result set? For example, consider a dimension set up for Television data as below.
Brand
Samsung
LG
Philips
Type
LEDs
LCDs
Plasma
Lets say, I refine the result set by brand, by selecting Philips. Now lets assume that there were 2 results returned for philips and both the results were of Type - Plasma. In this case, Endeca does not return the Type dimension in the result set, as we cannot drill down the 2 results further based on LED or LCD.
How does Endeca return these implicit dimensions in the result set in such scenarios? Suppose if there was a requirement to show to the user that both the results were of Type - Plasma, how do we get this information from Endeca, by default?
Thanks in advance :)

How does Endeca return these implicit dimensions in the result set in such scenarios?Check out: Navigation.getCompleteDimensions() or Navigation.getCompleteDimGroups()
http://docs.oracle.com/cd/E28910_01/PresentationAPI.622/apidoc/javadoc/navigation/index.html

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 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.

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

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 export the result to excel or txt as the SQL result format.

Hello,
I want to know how to export the result of the Oracle select result to a txt or a excel file.What is the command.
I knew the command of spool,but the format of it export is not the same to the result of Oracle result area.
Thank you very much.

Hello Yucky,
what do you mean by
the format of it export is not the same to the result of Oracle result areaDo you mean the output of a tool other than SQL*PLUS?
To enhance the formatting of a spool file you can set
SET MARKUP HTML ON
SPOOL ONthis will add html markup to format the output as a html table which you can open in a browser or in excel.
Regards
Marcus

How can we generate result set report?

how can we generate result set report ?means the out put of one query be the input of another query?how it is?

Hi
You have to use APD ( analysis process designer) to use results of one query as the input for the other queries.
Check this link
http://help.sap.com/saphelp_nw70/helpdata/en/49/7e960481916448b20134d471d36a6b/frameset.htm
Regards

How to handle large result set of a SQL query

Hi,
I have a question about how to handle large result set of a SQL query.
My query returns more than a million records. However, the Query Template has a "row count" parameter. If I don't specify it, it by default returns only 100 lines of records in the query result. If I specify it, then it's limited to a specific number.
Is there any way to get around of this row count issue? I don't want any restriction on the number of records returned by a query.
Thanks a lot!

No human can manage that much data...in a grid, a chart, or a direct-connected link to the brain.
What you want to implement (much like other customers with similar requirements) is a drill-in and filtering model that helps the user identify and zoom in on data of relevance, not forcing them to scroll through thousands or millions of records.
You can also use a time-based paging model so that you only deal with a time "slice" at one request (e.g. an hour, day, etc...) and provide a scrolling window. This is commonly how large datasets are also dealt with in applications.
I would suggest describing your application in more detail, and we can offer design recommendations and ideas.
- Rick

Virtual column in the result set of the query.

Hi folks,
I have table , let it be, EMP. It has columns ENAME,EMPNO,JOB etc.,
My requirement is to add an extra column, not present in the table, having NULL value at the time of diplaying the results of a query. I hope you got it. So a column that does not exists in the table should get displayed in the resultant set when we query the results from that table. so my question is, how to write the SELECT statement using that virtual column.
I'd thought of using X column in Dummy table but what if I don't have any dummy table in my particular schema.
Please do revert back with the solution.
Your effort'll be genuinely appreciated.
Cheers
PCZ

Hi,
If you just wany display null values you can write query like this :
SELECT ENAME,EMPNO,JOB , NULL DUMMY_COLUMN FROM emp;
Regrads
Avinash

How to hold the result set

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