How can i count no rows in my database table

plz tell me how can i count no of rows in my database table with[b] ResultSet object

Hi ! hope this code helps you .
We can use the count(*) to get the total no of records in the table ad then access it through the getString method .
import java.sql.*;
public class JdbcTest
     public static void main(String [] args ) throws Exception
          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          String DBURL = "jdbc:odbc:mydsn" ;
          Connection conn = DriverManager.getConnection(DBURL);
          Statement st = conn.createStatement();
          ResultSet rs = st.executeQuery("select count(*) from table1");
          rs.next();
          System.out.println("total rec = " + rs.getString(1));
Cheers !

Similar Messages

How to get the last row of a database table.

HI ,
I want to get record exactly from the last row of a database table.
How is that possible?

Hi,
To fetch last record from an internal table, just do find the number of records in it and read using index.
DESCRIBE TABLE ITAB LINES L_LINES.
READ TABLE ITAB INDEX L_LINES.
You can also use LOOP .. ENDLOOP but the above method is better (performance wise).
using LOOP .. ENDLOOP.
LOOP AT ITAB.
**do nothing
ENDLOOP.
**process ITAB (Header record of ITAB).
**after ENLOOP, ITAB will have the last record of the internal table.
[here ITAB is internal table as well as header record.]
But what is the requirement?
If you are looking for the current record of an employee then you can use ENDDA = HIGH_DATE.
My advice is to review your requirement again and try to fetch only that record which you need.
Mubeen

How can i update multiple row in a advance table

Dear all,
hope you are well enough.
suppose i have a table in a OA page where there are several transactions.
i would like to add a check box in front of every row.
when i check the transactions(rows of OA pages) and submit then one column of a table will be updated in database.
how can i implement that.
Please explain
Regards,
Mofizur

Hi,
Refer below code for iteration:
OAViewObject appVO = (OAViewObject)am.findViewObject("ApprovalsWVO1");
OARow row = (OARow)appVO.first();
for(int i=0;i<appVO.getRowCount();i++)
String appStatus=appVO.getCurrentRow().getAttribute("ApprovalStatus").toString();
if(appStatus.equalsIgnoreCase("NEW"))
newRow.setAttribute("appTrans",Boolean.FALSE);
else
newRow.setAttribute("appTrans",Boolean.TRUE);
System.out.println(appStatus);
row = (OARow)appVO.next();
Regards
Meher Irk

How can i edit perticular row in dynamically created table

Hi to All,
Here my requirement is create table dynamically from existing XML and first column with radio buttons,column data and row wise data there on XML but i'm able to create table and displaying data then whenever i click on first column radio button that row editable and remaining rows in disable mode then i edit that row and click on save button that particular row data will be inserted to XML.Please tell me how can i achieve this requirement.
Thanks and Regards,
surya.

Hi surya
- Use RadioButtonGroupByIndex for the first column.
- Disable automatic change of table's lead selection: selectionChangeBehaviour = manual, selectionMode = none.
- In onSelect event handler of the RadioButtonGroupByIndex set new table's lead selection from the code to the row where the button is clicked.
- Add calculated read-only attribute isRowEditable (boolean) to the table's node. Getter shall be like this:
return (element.index() == element.node().getLeadSelection());
- Bind the cell editors' enabled property to isRowEditable attribute.
BR, Siarhei
PS: this is my message #666 - do not trust it
Edited by: Siarhei Pisarenka on Feb 23, 2010 2:29 PM

How can i select the rows from the 3 tables by particular column name?

Vehicle Passing Summary table structure
          PsngSmry_ID(Number),Vehicle_iD(Number),PsngSmryTime(datetime)
Vehicle table structure
          Vehicle_iD(Number),VehicleName(VarChar2),VehicleType(VarChar2)
Here Vehicle_iD is the Primary Key
Equipment Table Structure
          Eqpmt_id(Number),Vehicle_iD(Number),EqpmtName(VarChar2),EqpmtType(VarChar2)
Here Eqpmt_id is the Primary Key and Vehicle_iD is the foreign Key
Equipment Component Table Structure
          Eqpmt_Cmpnt_id(Number) ,Eqpmt_id(Number),EqpmtCmpntName(VarChar2),EqpmtCmpntName(VarChar2),Parent_Eqpmnt_ID(Number)
Here Eqpmt_Cmpnt_id is the Primary Key and Eqpmt_id is the foreign Key
The rows in the Vehicle Passing Summary table
     PsngSmry_ID Vehicle_ID     PsngSmryTime
     111111          80986246     2010/10/11
     111112          80986247     2010/10/12
     111113          80986248     2010/10/10
The rows in the Vehicle Table
     Vehicle_iD     VehicleName     VehicleType
     80986246          Lorry          Four Wheeler
     80986247          Van          Four Wheeler
     80986248          Bus          Four Wheeler
The rows in the Equipment Table:
     Eqpmt_id     Vehicle_iD     EqpmtName          EqpmtType
     109846          80986246          2 Axle Lorry          CAR
109821          80986246          4 Axle Lorry          CAR
109825          80986246          4 Axle Lorry          CAR
     109562          80986247          2 Axle VAn          CAR
109555          80986247          3 Axle VAn          CAR
109777          80986247          3 Axle VAn          CAR
     109587          80986248          2 Axle Bus          CAR
The rows in the Equipment Component Table :
     Eqpmt_Cmpnt_id Eqpmt_id EqpmtCmpntName Parent_Eqpmnt_ID
     20904146          109846          Truck
     20904147          109846          Truck
     20904148          109846          Axle               20904146
     20904159          109846          Axle               20904146
     20904167          109846          Wheel               20904148
     20904177          109846          Wheel               20904148
     20904185          109846          Wheel               20904159
     20904325          109846          Wheel               20904159
     20904188          109846          Axle               20904147
     20904189          109846          Axle               20904147
     20904195          109846          Wheel               20904188
     20904196          109846          Wheel               20904188
     20904197          109846          Wheel               20904189
     20904398          109846          Wheel               20904189
     10904146          109562          Truck
     10904147          109562          Truck
     10904148          109562          Axle               10904146
     10904159          109562          Axle               10904146
     10904167          109562          Wheel               10904148
     10904177          109562          Wheel               10904148
     10904185          109562          Wheel               10904159
     10904325          109562          Wheel               10904159
     10904188          109562          Axle               10904147
     10904189          109562          Axle               10904147
     10904195          109562          Wheel               10904188
     10904196          109562          Wheel               10904188
     10904197          109562          Wheel               10904189
     10904398          109562          Wheel               10904189
Note : In Equipment Component Table,the hierarchy will be Truck-->Axle-->Wheel.So
1.the Parent_Eqpmnt_ID of Axle is Truck's Eqpmt_Cmpnt_id.
2.the Parent_Eqpmnt_ID of Wheel is Axle's Eqpmt_Cmpnt_id.
Now I want to write the store procedure which will take "PsngSmry_ID(Number)" as input and the o/p will be in the format :
     Eqpmt_Cmpnt_id Eqpmt_id EqpmtCmpntName Parent_Eqpmnt_ID
     20904146          109846      Truck
     20904148          109846      Axle               20904146
     20904167          109846      Wheel               20904148
     20904177          109846      Wheel               20904148
     20904159          109846      Axle               20904146
     20904185          109846      Wheel               20904159
     20904325          109846      Wheel               20904159
     20904147          109846      Truck
     20904188          109846      Axle               20904147
     20904195          109846      Wheel               20904188
     20904196          109846      Wheel               20904188
     20904189          109846      Axle               20904147
     20904197          109846      Wheel               20904189
     20904398          109846      Wheel               20904189
     10904146          109562          Truck
     10904148          109562          Axle               10904146
     10904167          109562          Wheel               10904148
     10904177          109562          Wheel               10904148
     10904159          109562          Axle               10904146
     10904185          109562          Wheel               10904159
     10904325          109562          Wheel               10904159
     10904147          109562      Truck
     10904188          109562      Axle               10904147
     10904195          109562      Wheel               10904188
     10904196          109562      Wheel               10904188
     10904189          109562      Axle               10904147
     10904197          109562      Wheel               10904189
     10904398          109562      Wheel               10904189
**Please add these columns in the o/p **
1.EqpmtName and EqpmtType from Eqpmt table
2.VehicleName and Vehicle Type from Vehicle table
3.PsngSmryTime from PassingSummary table **
Can anyone tell me the solution?
Edited by: 865216 on Jun 22, 2011 2:14 AM

Hi,
I am new to this technology;But, just wanted to help you.
Please refer the code it might be atleast helpful for you.
But am facing PL/SQL: ORA-00933: error and unable to resolve it.could anyone please correct this code.
sorry if my code is totally wrong.
Thank you,
Rupa
create or replace procedure Equipment_proc
is
begin
DECLARE
TYPE EQP_record IS RECORD (
Vehicle_iD Vehicle.Vehicle_iD%TYPE,
Eqpmt_Cmpnt_id Equipment_Component.Eqpmt_Cmpnt_id%type,
EqpmtCmpntName Equipment_Component.EqpmtCmpntName%type,
Parent_Eqpmnt_ID Equipment_Component.Parent_Eqpmnt_ID%type,
Eqpmt_id Equipment.Eqpmt_id%type,
vehicleId NUMBER);
EQP_rec EQP_record;
CURSOR EQP_cursor IS
select a.Vehicle_iD,c.Eqpmt_Cmpnt_id,b.Eqpmt_id,c.EqpmtCmpntName,c.Parent_Eqpmnt_ID
from Vehicle a,Equipment b,Equipment_Component c
where a.Vehicle_iD=b.Vehicle_iD
and b.Eqpmt_id=c.Eqpmt_id
and a.vehicle_id=&EQP_rec.vehicleId;
BEGIN
OPEN EQP_cursor;
     FETCH EQP_cursor INTO EQP_rec;
     dbms_output.put_line(EQP_rec.Vehicle_iD,EQP_rec.Eqpmt_Cmpnt_id||','||EQP_rec.Eqpmt_id||','||EQP_rec.EqpmtCmpntName||','||EQP_rec.Parent_Eqpmnt_ID);
CLOSE EQP_cursor;
END;
END;

How can I Insert data into my msaccess Database table

Hello all,
I am new to Java programming and I have problem that how can i insert name into my database table.
The code which i have written is following:
String filename = "d:/test.mdb";
String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
database+= filename.trim() + ";DriverID=22;READONLY=true}";
Connection con = DriverManager.getConnection(database,"","");
String s = String.valueOf(text.getText());
int k =10;
Statement st = con.createStatement();
st.execute("create table Test123(name text)");
st.execute("INSERT INTO Test123 values" +s);
on the INSERT program throws exception???
can any one help me how to insert data into tabel.
Thanks

he INSERT program throws exception???
can any one help me how to insert data into tabel.I have never used the jdbc driver to access, but what do you think that the flag READONLY=true means? An insert is not a read.
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Count all rows of a Database table

I want to count all the rows of a table.
I have made correctly the connection with the database and all the other things (make a statement, make the query and the resultSet), I use the MySQL server v4.0.17
Here is the code I use:
int count=0;
String temp=null;
String query = "SELECT COUNT(*) FROM customers";//customers is my Database Table
try {
rs = stmt.executeQuery(query);
}//end try
catch(Exception exc) {
createFeatures.PlayErrorSound(registerRenter);
Optionpane.showMessageDialog(registerRenter,
"MESSAGE", "ERROR", JOptionPane.ERROR_MESSAGE);
}//end catch
try {
while(rs.next()) {
count++; //I use this variable in order to count the rows because the resultSet doesn't tell me the answer
countLine=rs.getInt(1);
}//end while
}//end try
catch(Exception exc) {
createFeatures.PlayErrorSound(registerRenter);
Optionpane.showMessageDialog(registerRenter,
"MESSAGE", "ERROR", JOptionPane.ERROR_MESSAGE);
}//end catch
count=count++; //i increase it aggain because if the rows are initial 0 i want to make it 1
temp = String.valueOf(count);//i use this command in order to display the result into a jtextfield
Any help is appreciated!!!!!

This program will work just fine against mysql:
mport java.util.*;
import java.io.*;
import java.sql.*;
public class Test {
public static void main(String []args) {
String url= "jdbc:mysql://localhost/adatabase";
String query = "select count(*) from foo2";
String createQuery="create table foo2(f1 int)";
String dropQuery="drop table foo2";
String insertQuery="insert into foo2 values(1)";
Properties props = new Properties();
props.put("user", "auser");
props.put("password", "xxxxx");
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
System.out.println("Connecting to the msql server");
Connection con = DriverManager.getConnection(url, props);
Statement stmt = con.createStatement();
try {
stmt.executeUpdate(dropQuery);
} catch(SQLException e) {}
stmt.executeUpdate(createQuery);
stmt.executeUpdate(insertQuery);
stmt.executeUpdate(insertQuery);
PreparedStatement pstmt = con.prepareStatement(query);
System.out.println("***Executing a select");
ResultSet rs = pstmt.executeQuery();
while (rs.next()) {
System.out.println("RowCount="+ rs.getString(1));
rs.close();
pstmt.close();
stmt.close();
con.close();
} catch(Exception e) {
System.out.println(e.getMessage());
}

JDeveloper 11g: How to get all the rows of a database table from applicatio

Hello all!
I'm developing a application with JDeveloper 11g, like subject show.
So, I'm suppose to use some data which are in database table.
So, I had the View Object where I want take data, to the datamodel.
And after this, I use this next line in my serviceClass.java:
public String method(){
        String truc = null;
        getViewName().setRangeSize(-1);
        getViewName().setRangeStart(0);
        getViewName().executeQuery();
//I do my treatment here
return truc
}When the application run, it stop just before the line "getViewName().setRangeSize(-1);"
So, I think it is the locking point.
Someone can help me.
Thank's
Nystan

Hi,
1. You work with a application module class and not in a plain old java object? So you create a application module or only a view object?
2. If you work with a application module class. Can you switch on a bit of logging? To set the system debug output property, open the Run/Debug/Profile page in the Project Properties dialog for your data model project. Click Edit to edit the chosen run configuration, and add following string to the Java Options field in the page.
-Djbo.debugoutput=console -Djbo.adflogger.level=FINE
maybe you can see the error.
Best regards
Martin

How can i know the row number of my table is being modified?

HI all,
I have a table in my web dynpro and several columns as checkbox... I put an event OnToggle in these columns.
Do you know any way to get the row or the row number?
If i use the method get_static_attributes return to me the selected row not the modified.
Thanks in advance !

EDIT: thanks ! is solved, i need to pass CONTEXT_ELEMENT' in the <ELEMNT_NAME>
This is my code:
DATA table_element TYPE REF TO if_wd_context_element.
DATA row_index TYPE i.
table_element = wdevent->get_context_element('CONTEXT_ELEMENT').
IF NOT table_element IS INITIAL.
row_index = table_element->get_index( ).
ENDIF.
Edited by: Husalban RM on Sep 15, 2010 4:53 PM

How can I check whether or not an database table exists?

Hi,
I am new to ABAP programming. And now I want to write an function that check whether an table exists in the dictionary.
It request the table name was given by the user input. So I have to check it dynamically.
Please give me some guide if you know about that.
Thanks.

Hi,
All the table names exist in DD02l table.
Fetch data from DD02l table by passing selectin screen parameter .
REPORT ysdn_new .
PARAMETERS: p_tab LIKE dd02l-tabname.
DATA: v_tab LIKE p_tab.
SELECT SINGLE tabname INTO v_tab FROM dd02l WHERE tabname = p_tab.
WRITE v_tab.
If ypu want to fetch from TADIR table only means you have to pass selection screen parameter in place of obj_name and TABL for OBJECT field.
SELECT SINGLE tabname INTO v_tab
FROM TADIR
WHERE obj_name = p_tab
AND object = 'TABL'.
This is other way of getting table name by passing selection screen parameter
this will work.
Please reward points if helpful...
Regds
Sivaparvathi

How can I label my rows on numbers so I can keep a running count? Dave

How can I label my rows on numbers so I can keep a running count?
i would like to number from 1 to 150 by highlighting and use a function command
Dave
               Name               Address          Email
Ex      1
          2
          3
          4
          150

Add a column to the left of column A (it will become column A).
Assuming you want to start with the first "name" in Row 2 (and NOT number the header row):
Two methods:
1.
In cell A2, enter =ROW()-1
Grab the Fill Handle (small circle, bottom right of the selected cell) and drag down to fil the formula into the rest of the cells in the column.
If the formula is placed in ALL non-header row cells in the column, it will automatically fill into any rows added to the table.
If rows are inserted or removed, numbers below the inserted/removed row will be automatically adjusted.
2.
In cell A2, enter a 1
In cell A3, enter a 2
Select both cells.
Grab the Fill Handle and drag down to the rest of the cells in the column.
These are fixed numbers. They will not be automatically filled into new rows added to the table, nor will they automatically update when rows are inserted into the table or removed from the table.
To add more numbers, select the last two cells currently containing numbers, drag the Fill Handle down.
Regards,
Barry

How to get count of rows for a table?

Hi,
How to get count of rows for a table and secondly, how can i have access to a particular cell in a table?
Regards,
Devashish

Hi Devashish,
WdContext.node<Your_node_name>().size() will give you the no: of rows.
This should be the node that is bound to the table's datasource property.
WdContext.node<Your_node_name>().get<node_name>ElementAt(index_value); will select the row at that particular index.
You can access an attribute of a particular row as
WdContext.node<Your_node_name>().get<node_name>ElementAt(index_value).get<attribute_name>();
Hope this helps,
Best Regards,
Nibu.
Message was edited by: Nibu Wilson

How can I display the rows into columns.

How can I display the rows into columns. I mean
Create table STYLE_M
(Master varchar2(10), child varchar2(10));
Insert itno style_m
('MASTER1','CHILD1');
Insert itno style_m
('MASTER2','CHILD1');
Insert itno style_m
('MASTER2','CHILD2');
Insert itno style_m
('MASTER3','CHILD1');
Insert itno style_m
('MASTER3','CHILD2');
Insert itno style_m
('MASTER3','CHILD3');
Note : The Master may have any number of childs.
I want to display like this..
Master child1, child2, child3, .......(dynamic)
MASTER1 CHILD1
MASTER2 CHILD1 CHILD2
MASTER3 CHILD1 CHILD2 CHILD3
Sorry for disturbing you. Please hlp me out if you have any slution.
Thanks alot.
Ram Dontineni

Here's a straight SQL "non-dynamic" approach.
This would be used if you knew the amount of children.
SELECT
     master,
     MAX(DECODE(r, 1, child, NULL)) || ' ' || MAX(DECODE(r, 2, child, NULL)) || ' ' || MAX(DECODE(r, 3, child, NULL)) children
FROM
     SELECT
          master,
          child,
          ROW_NUMBER() OVER(PARTITION BY master ORDER BY child) r
     FROM
          style_m
GROUP BY
     master
MASTER     CHILDREN
MASTER1    CHILD1
MASTER2    CHILD1 CHILD2
MASTER3    CHILD1 CHILD2 CHILD3             Since you said that the number of children can vary, I incorporated the same logic into a dynamic query.
SET AUTOPRINT ON
VAR x REFCURSOR
DECLARE
        v_sql           VARCHAR2(1000) := 'SELECT master, ';
        v_group_by      VARCHAR2(200) := 'FROM (SELECT master, child, ROW_NUMBER() OVER(PARTITION BY master ORDER BY child) r FROM style_m) GROUP BY master';
        v_count         PLS_INTEGER;
BEGIN
        SELECT
                MAX(COUNT(*))
        INTO    v_count
        FROM
                style_m
        GROUP BY
                master;
        FOR i IN 1..v_count
        LOOP
                v_sql := v_sql || 'MAX(DECODE(r, ' || i || ', child, NULL))' || ' || '' '' || ';
        END LOOP;
                v_sql := RTRIM(v_sql, ' || '' '' ||') ||' children ' || v_group_by;
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END;
PL/SQL procedure successfully completed.
MASTER     CHILDREN
MASTER1    CHILD1
MASTER2    CHILD1 CHILD2
MASTER3    CHILD1 CHILD2 CHILD3I'll point your other thread to this one.

How can I use multiple row insert or update into DB in JSP?

Hi all,
pls help for my question.
"How can I use multiple rows insert or update into DB in JSP?"
I mean I will insert or update the multiple records like grid component. All the data I enter will go into the DB.
With thanks,

That isn't true. Different SQL databases have
different capabilities and use different syntax, That's true - every database has its own quirks and extensions. No disagreement there. But they all follow ANSI SQL for CRUD operations. Since the OP said they wanted to do INSERTs and UPDATEs in batches, I assumed that ANSI SQL was sufficient.
I'd argue that it's best to use ANSI SQL as much as possible, especially if you want your JDBC code to be portable between databases.
and there are also a lot of different ways of talking to
SQL databases that are possible in JSP, from using
plain old java.sql.* in scriptlets to using the
jstlsql taglib. I've done maintenance on both, and
they are as different as night and day.Right, because you don't maintain JSP and Java classes the same way. No news there. Both java.sql and JSTL sql taglib are both based on SQL and JDBC. Same difference, except that one uses tags and the other doesn't. Both are Java JDBC code in the end.
Well, sure. As long as you only want to update rows
with the same value in column 2. I had the impression
he wanted to update a whole table. If he only meant
update all rows with the same value in a given column
with the same value, that's trivial. All updates do
that. But as far as I know there's know way to update
more than one row where the values are different.I used this as an example to demonstrate that it's possible to UPDATE more than one row at a time. If I have 1,000 rows, and each one is a separate UPDATE statement that's unique from all the others, I guess I'd have to write 1,000 UPDATE statements. It's possible to have them all either succeed or fail as a single unit of work. I'm pointing out transaction, because they weren't coming up in the discussion.
Unless you're using MySQL, for instance. I only have
experience with MySQL and M$ SQL Server, so I don't
know what PostgreSQL, Oracle, Sybase, DB2 and all the
rest are capable of, but I know for sure that MySQL
can insert multiple rows while SQL Server can't (or at
least I've never seen the syntax for doing it if it
does).Right, but this syntax seems to be specific to MySQL The moment you use it, you're locked into MySQL. There are other ways to accomplish the same thing with ANSI SQL.
Don't assume that all SQL databases are the same.
They're not, and it can really screw you up badly if
you assume you can deploy a project you've developed
with one database in an environment where you have to
use a different one. Even different versions of the
same database can have huge differences. I recommend
you get a copy of the O'Reilly book, SQL in a
Nutshell. It covers the most common DBMSes and does a
good job of pointing out the differences.Yes, I understand that.
It's funny that you're telling me not to assume that all SQL databases are the same. You're the one who's proposing that the OP use a MySQL-specific extension.
I haven't looked at the MySQL docs to find out how the syntax you're suggesting works. What if one value set INSERT succeeds and the next one fails? Does MySQL roll back the successful INSERT? Is the unit of work under the JDBC driver's control with autoCommit?
The OP is free to follow your suggestion. I'm pointing out that there are transactions for units of work and ANSI SQL ways to accomplish the same thing.

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Hi all. I have the following code:
package gui;
import db.*;
import javax.swing.table.AbstractTableModel;
import java.util.ArrayList;
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    public void removeRow(int index) {
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        fireTableRowsDeleted(0, 0);
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}Now in my MainJFrame class I have one button for additing and one button for removing a selected row. How can I add/remove rows with this two buttons.
Thanks

No my question is how can I add and remove rows WITH buttons My point was the code is the same. You use the addRow(...) method. Why did you write an addRow(...) method if you aren't going to use it?
I don't understand your problem. Do you not know how to write an ActionListener?

How can i count no rows in my database table

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