Deleting a row from a table using jsp

Given a table in a jsp, can an user click on a row of that table and retrieve the information so that the program can delete a record from a database table?
most of the tables that I have seen are static, the user cannot interact with them(specially when the user wants to delete several records from a database table).
Can anyone suggests a good book or way of deleting a row from table using jsp.

eg use a column in the table that has a radio button or check box,
on submit, get all the rows that are checked, using the row as an index into your db store, get the key and use the key to issue the sql delete command.

Similar Messages

Best practice for deleting multiple rows from a table , using creator

Hi
Thank you for reading my post.
what is best practive for deleting multiple rows from a table using rowSet ?
for example how i can execute something like
delete from table1 where field1= ? and field2 =?
Thank you

Hi,
Please go through the AppModel application which is available at: http://developers.sun.com/prodtech/javatools/jscreator/reference/codesamples/sampleapps.html
The OnePage Table Based example shows exactly how to use deleting multiple rows from a datatable...
Hope this helps.
Thanks,
RK.

Deleting a row from a table using javascript.......

Hi,
i am writting an application in which, i need the following:
1. calling a javascript on a click of a button named "Delete"
2. and javascript should delete that particular record under which the delete
button is placed which means... i am placing a delete button and a checkbox
under every record i display on my browser. When the check box is checked ,
and when the user clicks Delete button, it should delete that particular record.
Any one can help me in this please.....
Thanks in Advance....
Bala

<p>The short answer: You can't. At least not the way you're asking to.</p>
<p>
JavaScript does not (to my knowledge at least, someone please correct me if I'm wrong) have any way of connecting to an Oracle database to query for content, though it is possible with DHTML to substitute content into the page.
</p><p>
To do what you want, you're going to have to look into server-side scripting languages. Among the more notable examples are PHP, Perl, JSP, and ASP. I would recommend PHP, especially with the PHP right here at Oracle.com.
</p><p>
Anyways, what you're probably going to want to do is have a unique identifier for each row which you would be passing to the server and mark each delete button with that identifier. If you want the operation to be extremely transparent, you would use a HTTP-POST-style form parameter passing as opposed to HTTP-GET (which would expose all arguments on the command line, plus or minus any encryption you attempt to discourage script kiddies from probing the quality of your code).
</p><p>
But the important point here: There is no way to not send a request to the web server and still do what you want to do.
</p><p>
Hope that helps.
</p><p>
Cheers.
</p>

Deleting Multiple Rows From Multiple Tables As an APEX Process

Hi There,
I'm interesting in hearing best practice approaches for deleting multiple rows from multiple tables from a single button click in an APEX application. I'm using 3.0.1.008
On my APEX page I have a Select list displaying all the Payments made and a user can view individual payments by selecting a Payment from the Select List (individual items are displayed below using Text Field (Disabled, saves state) items with a source of Database Column).
A Payment is to be deleted by selecting a custom image (Delete Payments Button) displayed in a Vertical Images List on the same page. The Target is set as the same page and I gave the Request a name of DELETEPAY.
What I tried to implement was creating a Conditional Process On Submit - After Computations and Validations that has a source of a PL/SQL anonymous block as follows:
BEGIN
UPDATE tblDebitNotes d
SET d.Paid = 0
WHERE 1=1
AND d.DebitNoteID = :P7_DEBITNOTEID;
INSERT INTO tblDeletedPayments
( PaymentID,
DebitNoteID,
Amount,
Date_A,
SupplierRef,
Description
VALUES
( :P7_PAYMENTID,
:P7_DEBITNOTEID,
:P7_PAID,
SYSDATE,
:P7_SUPPLIERREF,
:P7_DESCRIPTION
DELETE FROM tblPayments
WHERE 1=1
AND PaymentID = :P7_PAYMENTID;
END;
The Condition Type used was Request = Expression 1 where Expression 1 had a value of DELETEPAY
However this process is not doing anything!! Any insights greatly appreciated.
Many thanks,
Gary.

...the "button" is using a page level Target,...
I'm not sure what that means. If the target is specified in the definition of a list item, then clicking on the image will simply redirect to that URL. You must cause the page to be submitted instead, perhaps by making the URL a reference to the javaScript doSubmit function that is part of the standard library shipped with Application Express. Take a look at a Standard Tab on a sample application and see how it submits the page using doSubmit() and emulate that.
Scott

Deleting a row from parent table

Dear Guru's
I am having two table with parent - child relationship. My problem is when I am deleting a row from parent table the curresponding child row from child table also should be deleted.
My Primary table 'Employee, EMPID Primary key
Child table 'Privilage' inthis EMPID referencing the EMPID of Employee table
My need is when I am deleting a row from parent table the curresponding child row from child table also should be deleted
I issued the SQL query like,
delete from employee where empid='12345' cascade constraints;
Then it showing me error like,
ERROR at line 1:
ORA-00933: SQL command not properly ended
Please resolve my issue , Its Top urgent
Thanks & Cheers
Antony

Choosing How Foreign Keys Enforce Referential Integrity
Oracle Database allows different types of referential integrity actions to be enforced, as specified with the definition of a FOREIGN KEY constraint:
Prevent Delete or Update of Parent Key The default setting prevents the deletion or update of a parent key if there is a row in the child table that references the key. For example:
CREATE TABLE Emp_tab (
FOREIGN KEY (Deptno) REFERENCES Dept_tab);Delete Child Rows When Parent Key Deleted The ON DELETE CASCADE action allows parent key data that is referenced from the child table to be deleted, but not updated. When data in the parent key is deleted, all rows in the child table that depend on the deleted parent key values are also deleted. To specify this referential action, include the ON DELETE CASCADE option in the definition of the FOREIGN KEY constraint. For example:
CREATE TABLE Emp_tab (
    FOREIGN KEY (Deptno) REFERENCES Dept_tab
        ON DELETE CASCADE); Set Foreign Keys to Null When Parent Key Deleted The ON DELETE SET NULL action allows data that references the parent key to be deleted, but not updated. When referenced data in the parent key is deleted, all rows in the child table that depend on those parent key values have their foreign keys set to null. To specify this referential action, include the ON DELETE SET NULL option in the definition of the FOREIGN KEY constraint. For example:
CREATE TABLE Emp_tab (
    FOREIGN KEY (Deptno) REFERENCES Dept_tab
        ON DELETE SET NULL);
SQL> conn scott/tiger
Connected.
SQL> create table ppk ( no number primary key);
Table created.
SQL> begin for inn in 1..10 loop insert into ppk values (inn); end loop; end;
PL/SQL procedure successfully completed.
SQL> create table ffk ( no number references ppk(no));
Table created.
SQL> begin for inn in 1..10 loop insert into ffk values (inn); end loop; end;
PL/SQL procedure successfully completed.
SQL> drop table ppk cascade constraints;
Table dropped.Message was edited by:
user52
Message was edited by:
user52
Message was edited by:
user52

Deleting a row from a table containing CLOB as one of the columns

When i delete a row from a table which contains a CLOB (internal clob) i.e. CLOB or BLOB column, Will the CLOB data will also be deleted ? I understand that what exactly stored in the CLOB column is the clob locator which points to the actual data.
So, when I delete this row, the clob locator will be deleted, but will the actual data what this locator is pointing to is also deleted ??? if not what is the process to delete the data the locator is pointing to when the row containing the locator is deleted ? If this is not happening then the actual data might become an orphan data which nobody has access to, will automatic garbage cleaning occurs on a frequent intravels to delete unaddressed data residing on the database server ?
Thanks in advance for the help, can email me at [email protected] alternatively.
Regards,
Srinivasa C.

Michael,
Thanks very much for your inputs, here are the results i got when i tried the way you explained in your answer, the TRUNCATE command made the actual size back to normal, but the delete is not the same, so, how can i delete the data that a particular clob locator may point to ?
truncate would delete all the rows of the table, which might not serve my purpose, i would like to delete a row and also it's associated clob data from the database! is there anyway to do this ?
is there any limitation on the ool_sample size? i am basically a c++ programmer, i am looking for some function like FREE which would free the allocated memory to the clob once the locator is deleted.
your help is greatly appreciated - Thanks!
:-) Srini.
==========================
My Results:
==========================
SQL> create table sample (
2 id integer primary key,
3 the_data CLOB default empty_clob() )
4 lob (the_data) store as ool_sample;
Table created.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
20K
SAMPLE
10K
SQL> select count(*) from sample;
COUNT(*)
0
SQL> begin
2 for i in 1..1000
3 loop
4 insert into sample values (i, RPAD('some data', 4000) );
5 end loop;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> delete sample;
1000 rows deleted.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> commit;
Commit complete.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
SAMPLE
70K
SQL> begin
2 for i in 1..1000
3 loop
4 insert into sample values (i, rpad('some data', 4000));
5 end loop;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
9616K
SAMPLE
70K
SQL> truncate table sample;
Table truncated.
SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
20K
SAMPLE
10K

Issue while deleting a row from a table

Dear friends,
i am getting an issue while deleting a row from a table, pls check screen shots , the first screen shot is my table contents
when i delete 2 row , the second row is deleting properly like below screen shot
but i want like below screen shot , Col1 contents should be like pic 1 . could any one pls let me know how to solve this issue.
Thanks
Vijaya

Hi vijaya,
please try this code, it will help you.
DATA : it_rows TYPE wdr_context_element_set,
          wa_rows LIKE LINE OF it_rows.
   DATA lo_nd_table TYPE REF TO if_wd_context_node.
    DATA lt_table TYPE wd_this->elements_table.
   DATA lo_el_table TYPE REF TO if_wd_context_element.
   DATA ls_vbap TYPE wd_this->element_table.
DATA: ld_index TYPE i.
data value TYPE sy-index.
* navigate from <CONTEXT> to <table> via lead selection
   lo_nd_table= wd_context->get_child_node( name = wd_this->wdctx_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
* get element via lead selection
* alternative access via index
* lo_el_table = lo_nd_table->get_element( index = 1 ).
* @TODO handle not set lead selection
   IF lo_el_table IS INITIAL.
   ENDIF.
* navigate from <CONTEXT> to <table> via lead selection
   lo_nd_table = wd_context->get_child_node( name = wd_this->wdctx_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
   lo_nd_table->get_static_attributes_table( IMPORTING table = lt_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
** @TODO compute values
** e.g. call a model function
* navigate from <CONTEXT> to <table> via lead selection
   lo_nd_table = wd_context->get_child_node( name = wd_this->wdctx_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
** @TODO compute values
** e.g. call a model function
it_rows = lo_nd_table>get_selected_elements( ).
   CALL METHOD lo_nd_table->GET_LEAD_SELECTION_INDEX
   RECEIVING
     INDEX = value .
LOOP AT it_rows INTO wa_rows.
     CALL METHOD wa_rows->get_static_attributes
       IMPORTING
              static_attributes = ls_table.
     READ TABLE lt_table INTO ls_table WITH KEY col1 = ls_table-col1.
      ld_index = value.
          ENDLOOP.
   CLEAR : ls_table-col2,
         ls_table-col2.
   MODIFY lt_table INDEX ld_index FROM ls_table.
lo_nd_table->bind_table( new_items = lt_table set_initial_elements = abap_true ).

How to delete multiple rows from ADF table

How to delete multiple rows from ADF table

Hi,
best practices when deleting multiple rows is to do this on the business service, not the view layer for performance reasons. When you selected the rows to delete and press submit, then in a managed bean you access thetable instance (put a reference to a managed bean from the table "binding" property") and call getSeletedRowKeys. In JDeveloper 11g, ADF Faces returns the RowKeySet as a Set of List, where each list conatins the server side row key (e.g. oracle.jbo.Key) if you use ADF BC. Then you create a List (ArrayList) with this keys in it and call a method exposed on the business service (through a method activity in ADF) and pass the list as an argument. On the server side you then access the View Object that holds the data and find the row to delte by the keys in the list
Example 134 here: http://blogs.oracle.com/smuenchadf/examples/#134 provides you with the code
Frank

Delete many rows from one table at once URGENT

Assume we have table called emp.
table desription:
SQL> desc emp
Name Null? Type
EMPNO NOT NULL NUMBER(6)
DIVISION NOT NULL NUMBER(3)
JOB_NO NOT NULL NUMBER(4)
START_DATE NOT NULL DATE
select * from emp;
EMPNO--------DIVISION--------JOB_NO------------START_DATE
1111------------------011-------------8181--------------04/10/1999
1111------------------011-------------8181--------------04/10/2004
2222------------------011-------------3131--------------05/11/2005
3333-----------------022-------------8181--------------06/09/2001
3333-----------------044-------------8181--------------06/08/1988
5555-----------------011-------------8066--------------01/01/2001
6666-----------------033-------------9600--------------01/01/1999
7777-----------------044-------------8181--------------06/24/1996
7777-----------------033-------------8181--------------12/02/1991
7777-----------------033-------------8181--------------03/01/2002
9999-----------------044-------------9191--------------03/05/1980
9999-----------------055-------------9191--------------03/06/1989
My goal is to delete employee records for those employee which contains multiple values for JOB_NO
equal to 8181, (JOB_NO= 8181) with new start_dateS.
We need to keep only one record for JOB_NO 8181 which contains oldest start_date.
Here is the delete statement for the single record.
delete from emp
where empno = 7777 and job_no = 8181 and start_date in ('03/01/2002','06/24/1996);
So how could I delete thousands records from the table with this logic?
After deleting multiple records table should be as below:
select * from emp;
EMPNO--------DIVISION--------JOB_NO---------START_DATE
1111-----------------011-------------8181--------------04/10/1999
2222-----------------011-------------3131--------------05/11/2005
3333-----------------044-------------8181--------------06/08/1988
5555-----------------011-------------8066--------------01/01/2001
6666-----------------033-------------9600--------------01/01/1999
7777-----------------033-------------8181--------------12/02/1991
9999-----------------044-------------9191--------------03/05/1980
9999-----------------055-------------9191--------------03/06/1989

Here's one way to do it. I think this fits your business rules. At least it matches the output for your first example. It uses an analytic. I just like using them.
SQL> select * from employees;
               EMPNO             DIVISION               JOB_NO START_DATE
                1111                   11                 8181 10-APR-1999
                1111                   11                 8181 10-APR-2004
                2222                   11                 3131 11-MAY-2005
                3333                   22                 8181 09-JUN-2001
                3333                   44                 8181 08-JUN-1988
                5555                   11                 8066 01-JAN-2001
                6666                   33                 9600 01-JAN-1999
                7777                   44                 8181 24-JUN-1996
                7777                   33                 8181 02-DEC-1991
                7777                   33                 8181 01-MAR-2002
                9999                   44                 9191 05-MAR-1980
                9999                   55                 9191 06-MAR-1989
12 rows selected.
SQL> delete employees
2 where rowid in
3           (select rowid
4            from
5            (
6               select empno
7                     ,job_no
8                     ,start_date
9                     ,row_number() over (partition by empno, job_no order by start_date) rn
10               from   employees
11               where job_no = 8181
12            )
13            where rn > 1
14           )
15 ;
4 rows deleted.
SQL> select * from employees;
               EMPNO             DIVISION               JOB_NO START_DATE
                1111                   11                 8181 10-APR-1999
                2222                   11                 3131 11-MAY-2005
                3333                   44                 8181 08-JUN-1988
                5555                   11                 8066 01-JAN-2001
                6666                   33                 9600 01-JAN-1999
                7777                   33                 8181 02-DEC-1991
                9999                   44                 9191 05-MAR-1980
                9999                   55                 9191 06-MAR-1989
8 rows selected.

Deleting a row from a table control through right-click menu

I have a table control. I want to delete a row from it when a user right clicks on a particular row and selects "Delete row" menu item. I have managed the creation of menu item but have not been able to delete the row which is right clicked and the menu item "Delete row" is selected. Guidance required! Thanks!

smercurio_fc wrote:
It's irrelevant whether the table is a control or indicator. See attached VI.
Hi smercurio,
please see the attached picture. In my previous post i mean the different in the menu. The red marked function is not available, if the table is an indicator. LV8.5!
Mike
Message Edited by MikeS81 on 04-18-2008 05:19 PM
Attachments:
Unbenannt.PNG ‏22 KB

Deleting a row from a JTable using AbstractTableModel

Hi,
Can someone please help me on how should i go about deleting a row in a jtable using the AbstractTableModel. Here i know how to delete it by using vector as one of the elements in the table. But i want to know how to delete it using an Object[][] as the row field.
Thanks for the help

Hi,
I'm in desperate position for this please help

Delete row from internal table using field symbol.

Hi friends,
I created dynamic internal table using field symbol. I want to delete some data using where clause.
for example. i want to use like,
DELETE <FS> WHERE KUNNR = WA_KNA1-KUNNR.
Like the above statment it won't work. How i can use delete with where clause in field symbols.
Hope any one can help me.
Thanks and regards
Srikanth. S

hi Srikanth,
I think you have to LOOP through the whole internal table and check each line and decide to delete or not:
LOOP at <itab> INTO <wa>.
ASSIGN COMPONENT 'KUNNR' OF STRUCTURE <wa> TO <field>.
CHECK <field> IS ASSIGNED.
IF <field> EQ WA_KNA1-KUNNR.
DELETE ...
ENDIF.
UNASSIGN <field>.
ENDLOOP.
hope this helps
ec

Stored procedure to delete a row from a table

I have forgotten how to do this and cant find my college notes so here goes...
How do you create a stored prcedure to delete a row of data from a table, I want to pass in three parameters to identify the unique row. Any help would be great

Since you use the work hyperlink, I'm assuming that you are developing some sort of web-based front end. If you are having flow control issues, you probably want to address your question to a forum that specializes in your particular front-end language/ environment/ framework. A JSP app using Struts, an ASP.Net app using C#, and a PHP app will all have rather different approaches to state control and page flow.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Delete operation is not working to delete selected row from ADF table

Hi All,
We are working on jdev 11.1.1.5.3. We have one ADF table as shown below. My requirement is to delete a selected row from table, but it is deleting the first row only.
<af:table value="#{bindings.EventCalendarVO.collectionModel}" var="row"
rows="#{bindings.EventCalendarVO.rangeSize}"
emptyText="#{bindings.EventCalendarVO.viewable ? applcoreBundle.TABLE_EMPTY_TEXT_NO_ROWS_YET : applcoreBundle.TABLE_EMPTY_TEXT_ACCESS_DENIED}"
fetchSize="#{bindings.EventCalendarVO.rangeSize}"
rowBandingInterval="0"
selectedRowKeys="#{bindings.EventCalendarVO.collectionModel.selectedRow}"
selectionListener="#{bindings.EventCalendarVO.collectionModel.makeCurrent}"
rowSelection="single" id="t2" partialTriggers="::ctb1 ::ctb3"
>
To perform delete operation i have one delete button.
<af:commandToolbarButton
text="Delete"
disabled="#{!bindings.Delete.enabled}"
id="ctb3" accessKey="d"
actionListener="#{AddNewEventBean. *deleteCurrentRow* }"/>
As normal delete operation is not working i am using programatic approach from bean method. This approach works with jdev 11.1.1.5.0 but fails on ver 11.1.1.5.3
public void deleteCurrentRow (ActionEvent actionEvent) *{* DCBindingContainer bindings =
(DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
DCIteratorBinding dcItteratorBindings =
bindings.findIteratorBinding("EventCalendarVOIterator");
// Get an object representing the table and what may be selected within it
ViewObject eventCalVO = dcItteratorBindings.getViewObject();
// Remove selected row
eventCalVO.removeCurrentRow();
it is removing first row from table still. Main problem is not giving the selected row as current row. Any one point out where is the mistake?
We have tried the below code as well in deleteCurrentRow() method
RowKeySet rowKeySet = (RowKeySet)this.getT1().getSelectedRowKeys();
CollectionModel cm = (CollectionModel)this.getT1().ggetValue();
for (Object facesTreeRowKey : rowKeySet) {
cm.setRowKey(facesTreeRowKey);
JUCtrlHierNodeBinding rowData = (JUCtrlHierNodeBinding)cm.getRowData();
rowData.getRow().remove();
The same behavior still.
Thanks in advance.
Rechin
Edited by: 900997 on Mar 7, 2012 3:56 AM
Edited by: 900997 on Mar 7, 2012 4:01 AM
Edited by: 900997 on Mar 7, 2012 4:03 AM

JDev 11.1.1.5.3 sounds like you are using oracle apps as this not a normal jdev version.
as it works in 11.1.1.5.0 you probably hit a bug which you should file with support.oracle.com...
Somehow you get the first row instead of the current row (i guess). You should debug your code and make sure you get the current selected row in your bean code and not the first row.
This might be a problem with the bean scope too. Do you have the button (or table) inside a region? Wich scope does the bean have?
Anyway you can try to remove the iterator row you get
public void deleteCurrentRow (ActionEvent actionEvent) { DCBindingContainer bindings =
(DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
DCIteratorBinding dcItteratorBindings =
bindings.findIteratorBinding("EventCalendarVOIterator");
dcItteratorBindings.removeCurrentRow();Timo

Deleting a row from advance table:urgent

Hi All,
I am using Advance table with "Add Another Row" button.Situation is like this, i have an empty row and an exsist row in my Table. Against each row i have a Delete image.Now my problem is, when I am clicking on the Delete image, i am getting the empty row id which is there is the VO cache,not the one against which i have clicked on the Delete image.Please help me to solve this problem.
Thanks in Advance,
Vikram

For the Delete image, why dont you enable a firePartialAction on that and use SPEL binding to pass a unique id (like an <object>_id) as an EVENT PARAM to the Controller. From there on you can pass it to the AM and delete that particular row.
For adding a new row, if you use the default add row feature in the advanced table and set the Insert Rows Automatically property to true, it should take care of inserting the rows by default at the end of your existing rows, without you having to write any code for it.
If, on the other hand, you want to manually add the new row yourself, such as for defaulting some values into the new row, then you might want to explore if insertRowAtRangeIndex will work.

Deleting a row from a table using jsp

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