Modifying datatype of columns across multiple tables

Hi,
I have a requirement where-in I have to modify the datatypes of columns across multiple tables. Is there any direct way to do this? I mean does oracle has any function or in-built functionality to achieve this.
Example;
Table1 -> col1 datatype needs to be changed to varchar2(10)
Table2 -> col2 datatype needs to be changed to varchar2(30)
Table3 -> col3 datatype needs to be changed to number.
and so on....
Do we have such functionality?
Thanks,
Ishan

Hi Aman,
Seeing the replies, I think I was unclear in the requirements. But I guess you understood it fully, but still I would like to restate my question once again, just to be 100% sure.
What I actually want is that in one shot, I would be able to modify columns of multible tables.
eg, table1-> col1 changed to varchar2(20);
table2->col2 changed to varchar2(10)
table3-> col3 changed to number;
I know how to do it individually, but just wanted to check, if only one command can modify the datatypes of multiple tables/.
If not, I have already written half the script, but just for knowledge sake wanted to check if some feature is available in oracle for that.
Regards,
Ishan

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Indexing multiple columns in multiple tables

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Indexing multiple columns of multiple tables

Hi,
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I'm still pretty new to working with databases, but have been
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etc
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Creating chart from single column of multiple tables in Numbers '09

I have multiple tables (spread across multiple sheets) in my document. In column B of each table is a name. The other columns contain other categorized data. Each table has a variable number of rows, but each name is unique within a table. A particular name in any one table may or may not occur in another.
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I would also like to be able to sort the chart from highest to lowest.
Message was edited by: Sir Reginald

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Message was edited by: Sir Reginald

Row selection across multiple tables

Hi
I currently have multiple tables where, if the user selects a particular row or group of rows in one table the correspondign row or group of rows is selected in the other table.
At the moment I've acheived this by placing listSelection listeners on all the tables so that when the selection on one table changes it fires an event and updates the slection on the other tables using:
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firstTable.getSelectedRows()[0],
firstTable.getSelectedRows()[firstTable.getSelectedRowCount() - 1]
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Because the method I've got selects all rows between the start and finish of the selection it means rows are highlighted on the other tables that are not highlighted on the first table.
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Thanks

What you are doing is correct in principle (use a
listener to propagate the selection)
Always a good start :-)
but you need to
understand the subtleties of the ListSelectionEvent -
read the API carefully - it gives you a range of
indices which may have changed but does not tell you
whether any specific indices in that range are
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That makes sense, the event just indicates that the selection has changed yes?
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the source ListModel from the event and query each
row in the event range to determine its selection
state.
This is where I run into difficulty. I think I can go through the each row and find out if its selected or not (using isSelectedIndex(i))
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Implement Conditional Read-Only of Column Across Two Tables

Hello,
I would like to implement a "conditional read-only" mechanism on a column in a table with two tables in total being involved in this situation.
I have a demo/proof of concept of this and things are working as expected in the tests I have performed; however, I would like any input as to whether there is a better way, etc.
Here's a contrived demo but which illustrates the key ingredients nevertheless. Oracle version 10.2.0.4 64-bit on Windows Server 2008 Release 2 64-bit.
- Table DDL and small sample data
create table band(
band_id   number primary key,
band_name varchar2(20),
status    varchar2(20)
create table band_member(
band_id references band,
member_name varchar2(20)
insert into band values(3, 'The Rutles', 'prefab4');
insert into band values(4, 'The Beatles', 'established');
commit;
insert into band_member values(3, 'Ron Nasty');
insert into band_member values(3, 'Dirk McQuickly');
insert into band_member values(3, 'Stig O''Hara');
insert into band_member values(3, 'Barrington Womble');
commit;
insert into band_member values(4, 'John Lennon');
insert into band_member values(4, 'Paul McCartney');
insert into band_member values(4, 'George Harrison');
insert into band_member values(4, 'Ringo Starr');
commit;- The rules regarding the conditional read-only goal
1. Not permitted to update band.band_name when band.status='prefab4'
2. Not permitted to insert/update/delete any rows in band_member when the parent row has band.status='prefab4'
- Triggers used to implement the goal (current solution)
create or replace trigger t1
before update of band_name on band
for each row
when (old.status = 'prefab4' or new.status = 'prefab4')
begin
raise_application_error(-20010,
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end;
create or replace trigger t2
before insert or update or delete on band_member
for each row
declare
l_status band.status%type;
l_band_id band_member.band_id%type;
cursor l_cursor (p_band_id number) is
select status from band
where band_id = p_band_id
for update;
begin
if updating or inserting then
    l_band_id := :new.band_id;
else
    l_band_id := :old.band_id;
end if;
open l_cursor(l_band_id);
fetch l_cursor into l_status;
close l_cursor;
if l_status = 'prefab4' then
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end if;
end;
/- Quick sample test for each condition
update band
set    band_name = 'THE RUTLES'
where band_id = 3;
update band
ERROR at line 1:
ORA-20010: can not update band_name when status='prefab4'
ORA-06512: at "DEMO.T1", line 2
ORA-04088: error during execution of trigger 'DEMO.T1'
update band_member
set    member_name = 'RON NASTY'
where member_name = 'Ron Nasty';
update band_member
ERROR at line 1:
ORA-20011: can not update child when parent status='prefab4'
ORA-06512: at "DEMO.T2", line 18
ORA-04088: error during execution of trigger 'DEMO.T2'As I say, whilst my simple tests look to show the correct results, I'm left wondering if there might be a better way to implement said functionality.
I've attempted to provide the required information, but if I've managed to omit anything, please let me know.
Cheers,
Chalfont

Hi, Chalfont,
user13146957 wrote:
I went the cursor route to add the "for update" clause to force serialisation on the row - i.e. the idea was to avoid the case where another session might have wanted to update the status an instant after my fetch but before the remainder of the code completed. Does that make sense?No not really. The trigger on band prevents anyone from ever changing status from 'prefab4' to anything else (or vice-versa).
Even aside from that, you're putting in some effor to prevent something that will be allowed a split second later (or maybe the other way around). What's so significant about that split second?
I've been thinking of other ideas rather than the trigger approach, but have come up empty, as it were, thus far. I'm open to using other approaches and making some schema changes is not off the table either.FGA (Fine Grained Access), or its older sibling VPD (Virtual Private Database) can also do what you want, but, instead of raising an error, they just ignore the illegal action. This may be an advantage or a disadvantage, depending on your requirements.
Another approach is for the owner of the table not to grant INSERT, UPDATE or DELETE privileges to anyone: all DML must be done through a procedure (or procedures) owned by the table owner, who grants EXECUTE privileges instead of the other privileges.

How to maintain same width of columns across different table sections in OBIEE reprot

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Hi all,
I am relatively new to SQL.
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In my query I need to:
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How do I actually use group by with so many columns to be selected?
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select count(*), table1.col1, table1.col2, table1.col3, table2.col3, table2.col4, table2.col6, table3.col1, table3.col4, table3.col5
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<conditions>........................
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Hmm yes it actually does return count as 1 for each row. But there are 3 rows returned. E.g.
ctr table1.col1 table1.col2 ..........
1 value1 value1
1 value2 value3
1 value3 value4
If I put the count(*) outside, it returns 3 , the correct output
ctr
3
select count(*) from
select table1.col1, table1.col2, table1.col3, table2.col3, table2.col4, table2.col6, table3.col1, table3.col4, table3.col5
from table1, table2, table3
where
<conditions>
group by table1.col1, table1.col2, table1.col3, table2.col3, table2.col4, table2.col6, table3.col1, table3.col4, table3.col5
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Stored procedure in package return multiple columns from multiple tables

Hi ,
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example:
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one more question:
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TYPE col1 is TABLE of varchar
TYPE col2 is TABLE of varchar
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You can try one procedure with OUT or IN/OUT parameters that collect the values from one or more sql statements.
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(P_COD IN TABLE.COD%TYPE,
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P_DESC2 OUT TABLE2.DESC2%TYPE)
IS
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Greetings,
I have a program that has 3 tables. When the user selects a row on one table, I want the corresponding rows in the other tables to be selected also. A corresponding row is defined (in this case) as a row whose column 1 value is the same. Column 1, in this case, is a company name, and the tables reference yearly info for those companies. So, if a user selects company #34, I would like it to select company #34 across the other two tables, also.
I have established list selection listeners for each table that changes the selection for the other two tables.
This code, however, doesn't work. two things are broken: 1) the cross-selection only works if the selection is moving up the table, but not down the table. 2) the scrrollRectToVisible on the viewport isn't working. What am I doing wrong? Thanks in advance.
import java.awt.Rectangle;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;
* @author Ryan
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for(int j = 1; j < data[i].length; j++){
data[i][j] = "" + i + ", " + j;
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// All 3 data models are the same here, in my app however, they aren't.
DefaultTableModel model1 = new DefaultTableModel(data, headers);
DefaultTableModel model2 = new DefaultTableModel(data, headers);
DefaultTableModel model3 = new DefaultTableModel(data, headers);
// Init Tables. Tables and ScrollPanes are delcared as final to enable access from within ListSelectionEvent
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final JTable jTable1 = new JTable(model1);
jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp1 = new JScrollPane();
sp1.setViewportView(jTable1);
// Table 2
final JTable jTable2 = new JTable(model2);
jTable2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp2 = new JScrollPane();
sp2.setViewportView(jTable2);
// Table 3
final JTable jTable3 = new JTable(model3);
jTable3.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp3 = new JScrollPane();
sp3.setViewportView(jTable3);
// Add scrollpanes to panel.
JPanel panel1 = new JPanel();
panel1.add(sp1);
panel1.add(sp2);
panel1.add(sp3);
// Add Panel to frame.
JFrame frame = new JFrame("tableSelection");
frame.add(panel1);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
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jTable1.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
// Get the first cell in the selected row, I call it "row key".
String rowKey = jTable1.getValueAt(e.getFirstIndex(), 0).toString();
for(int i = 0; i < jTable2.getRowCount(); i++){
if(jTable2.getValueAt(i, 0).equals(rowKey)){
jTable2.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable2.getCellRect(i, 0, true);
sp2.getViewport().scrollRectToVisible(rect);
break;
for(int i = 0; i < jTable3.getRowCount(); i++){
if(jTable3.getValueAt(i, 0).equals(rowKey)){
jTable3.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable3.getCellRect(i, 0, true);
sp3.getViewport().scrollRectToVisible(rect);
break;
jTable2.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
// Get the first cell in the selected row, I call it "row key".
String rowKey = jTable2.getValueAt(e.getFirstIndex(), 0).toString();
for(int i = 0; i < jTable1.getRowCount(); i++){
if(jTable1.getValueAt(i, 0).equals(rowKey)){
jTable1.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable1.getCellRect(i, 0, true);
sp1.getViewport().scrollRectToVisible(rect);
break;
for(int i = 0; i < jTable3.getRowCount(); i++){
if(jTable3.getValueAt(i, 0).equals(rowKey)){
jTable3.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable3.getCellRect(i, 0, true);
sp3.getViewport().scrollRectToVisible(rect);
break;
jTable3.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
// Get the first cell in the selected row, I call it "row key".
String rowKey = jTable3.getValueAt(e.getFirstIndex(), 0).toString();
for(int i = 0; i < jTable1.getRowCount(); i++){
if(jTable1.getValueAt(i, 0).equals(rowKey)){
jTable1.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable1.getCellRect(i, 0, true);
sp1.getViewport().scrollRectToVisible(rect);
break;
for(int i = 0; i < jTable2.getRowCount(); i++){
if(jTable2.getValueAt(i, 0).equals(rowKey)){
jTable2.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable2.getCellRect(i, 0, true);
sp2.getViewport().scrollRectToVisible(rect);
break;

New code:
import java.awt.Rectangle;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;
* @author Ryan
public class TableSelection {
    public static void main(String[] args){
        // Init data model data.
        Object[][] data1 = new Object[100][5];
        Object[][] data2 = new Object[50][5];
        Object[][] data3 = new Object[50][5];
        for(int i = 0; i < data1.length; i++){
            data1[0] = "Company # " + (i+1);
for(int j = 1; j < data1[i].length; j++){
data1[i][j] = "" + (i+1) + ", " + j;
for(int i = 0; i < data2.length; i++){
data2[i][0] = "Company # " + ((i * 2) + 1);
for(int j = 1; j < data2[i].length; j++){
data2[i][j] = "" + ((i * 2) + 1) + ", " + j;
for(int i = 0; i < data3.length; i++){
data3[i][0] = "Company # " + (i * 2);
for(int j = 1; j < data3[i].length; j++){
data3[i][j] = "" + (i * 2) + ", " + j;
// Init headers.
String[] headers = {"Col 1" , "Col 2", "Col 3", "Col 4", "Col 5"};
// All 3 data models are the same here, in my app however, they aren't.
DefaultTableModel model1 = new DefaultTableModel(data1, headers);
DefaultTableModel model2 = new DefaultTableModel(data2, headers);
DefaultTableModel model3 = new DefaultTableModel(data3, headers);
// Init Tables. Tables and ScrollPanes are delcared as final to enable access from within ListSelectionEvent
// Table 1
final JTable jTable1 = new JTable(model1);
jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp1 = new JScrollPane();
sp1.setViewportView(jTable1);
// Table 2
final JTable jTable2 = new JTable(model2);
jTable2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp2 = new JScrollPane();
sp2.setViewportView(jTable2);
// Table 3
final JTable jTable3 = new JTable(model3);
jTable3.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp3 = new JScrollPane();
sp3.setViewportView(jTable3);
// Add scrollpanes to panel.
JPanel panel1 = new JPanel();
panel1.add(sp1);
panel1.add(sp2);
panel1.add(sp3);
// Add Panel to frame.
JFrame frame = new JFrame("tableSelection");
frame.add(panel1);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
// List Selection Listeners
jTable1.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
// Get the first cell in the selected row, I call it "row key".
String rowKey = jTable1.getValueAt(e.getFirstIndex(), 0).toString();
for(int i = 0; i < jTable2.getRowCount(); i++){
if(jTable2.getValueAt(i, 0).equals(rowKey)){
jTable2.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable2.getCellRect(i, 0, true);
sp2.getViewport().scrollRectToVisible(rect);
break;
if(i == jTable2.getRowCount() - 1)
jTable2.clearSelection();
for(int i = 0; i < jTable3.getRowCount(); i++){
if(jTable3.getValueAt(i, 0).equals(rowKey)){
jTable3.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable3.getCellRect(i, 0, true);
sp3.getViewport().scrollRectToVisible(rect);
break;
if(i == jTable3.getRowCount() - 1)
jTable3.clearSelection();
jTable2.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
// Get the first cell in the selected row, I call it "row key".
String rowKey = jTable2.getValueAt(e.getFirstIndex(), 0).toString();
for(int i = 0; i < jTable1.getRowCount(); i++){
if(jTable1.getValueAt(i, 0).equals(rowKey)){
jTable1.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable1.getCellRect(i, 0, true);
sp1.getViewport().scrollRectToVisible(rect);
break;
if(i == jTable1.getRowCount() - 1)
jTable1.clearSelection();
for(int i = 0; i < jTable3.getRowCount(); i++){
if(jTable3.getValueAt(i, 0).equals(rowKey)){
jTable3.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable3.getCellRect(i, 0, true);
sp3.getViewport().scrollRectToVisible(rect);
break;
if(i == jTable3.getRowCount() - 1)
jTable3.clearSelection();
jTable3.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
// Get the first cell in the selected row, I call it "row key".
String rowKey = jTable3.getValueAt(e.getFirstIndex(), 0).toString();
for(int i = 0; i < jTable1.getRowCount(); i++){
if(jTable1.getValueAt(i, 0).equals(rowKey)){
jTable1.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable1.getCellRect(i, 0, true);
sp1.getViewport().scrollRectToVisible(rect);
break;
if(i == jTable1.getRowCount() - 1)
jTable1.clearSelection();
for(int i = 0; i < jTable2.getRowCount(); i++){
if(jTable2.getValueAt(i, 0).equals(rowKey)){
jTable2.getSelectionModel().setSelectionInterval(i, i);
Rectangle rect = jTable2.getCellRect(i, 0, true);
sp2.getViewport().scrollRectToVisible(rect);
break;
if(i == jTable2.getRowCount() - 1)
jTable2.clearSelection();

Modifying datatype of columns across multiple tables

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