Table referenced by more than one other table

I'm no DBA so I was wondering if you could answer this fairly basic question. If I have a table that references more than 1 other table. For example Order links to a customer or Order can link to an Employee how would I represent that in the data model?
I'm guessing I could have the Order table have both an Employee ID and a Customer ID columns and null one or the other out depending on whether it was linked to an Employee or Customer but that seems a bit redundant in that there would always be at least one column being null.
Perhaps I could use table inheritance and just add the relevant foreign key col on the inherited tables but I'm fairly sure you can't have abstract tables.
Thanks for the help.

For example:
table a = Primary_key1, col2, col3
table b = Primary_key1, primary_key2, col3
table c = Primary_key2, col2
To join all this tables you must do something like this:
select ....
from tablea,tableb,tablec
where tablea.Primary_key1=tableb.primary_key1 and
tableb.Primary_key2=tablec.primary2;

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Will BI server return records with Cartesian join?
Is it mandatory if logical table is having more than one logical table sources(exp. Logical table sources are X,Y and underlying table is A,B respectively),
The underlying tables (A&B) must be joined ?
Can someone explain the logic behind the logical table sources? How does it work?
Any reference of document will be appreciable.
Thanks,Ashish

Hi Stijn,
Thanks for response.
You are saying that Oracle BI server will run a query against both tables and combine the results. But if there is no possibilty of any type of join, how BI server will combine the results from both tables.
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How can i model this scenario?

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I have created EO based on a database view than consists of two tables, and only one is updateable.
When I try to update a row using EO, I got a following message: "ORA-01776-cannot modify more than one base table through a join view"
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Thanks for answer.
When I set "updateable" property to "Never", that attribute is protected from any change.
I'm sorry for incomplete usecase.
I have set up a list of value on that attribute, because it is a lookup field for another table and I need to get an ID from that table.
Basically, I need that attribute to be updateble for BC, but not for database.
Edited by: MarioK on Oct 13, 2011 9:28 AM

Cannot modify more than one base table through a join view

hi guys, my current problem is that i have a datablock based on a view, now all the fields bar 1 are updateable, but this one field that is obtained through a join is displayed, the user can enter data in this field which then pupulates other fields which are required, but this specific field should not be updated. Is there an option to state this as i keep getting the error:
cannot modify more than one base table through a join view
Any help would be greatly appreciated, thanks.

the user can enter data in this field which then pupulates other fields So, using the value of "this field" you then query the rest of the fields? Can you show us the code you use to populate the rest of the fields?
but this specific field should not be updatedHave you tried setting the "Query Only" property of the field to "Yes" and the other DML properties (Ins, Upd, Del) to No?
Also, what is your Forms version?
Thanks,
Craig B-)
If someone's response is helpful or correct, please mark it accordingly.

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Hello There.
Can I handle more than one child table for a master table by code?
if I can, how do I create this udo, I have tryed the following code, but it takes the last child table ("jobs7")
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Hi Hagai
after oUserObjectMD.ChildTables.TableName = "JOBS1"
just write
oUserObjectMD.ChildTables.Add
that would be
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oUserObjectMD.ChildTables.TableName = "JOBS1"
oUserObjectMD.ChildTables.Add
oUserObjectMD.ChildTables.TableName = "JOBS2"
oUserObjectMD.ChildTables.Add
oUserObjectMD.ChildTables.TableName = "JOBS3"
oUserObjectMD.ChildTables.Add
oUserObjectMD.ChildTables.TableName = "JOBS4"
oUserObjectMD.ChildTables.Add
oUserObjectMD.ChildTables.TableName = "JOBS5"
oUserObjectMD.ChildTables.Add
oUserObjectMD.ChildTables.TableName = "JOBS6"
oUserObjectMD.ChildTables.Add
oUserObjectMD.ChildTables.TableName = "JOBS7"

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Hi Data Archiving Experts,
Could you please help me how to create the Field Catalogs (More than one Source Table). If any one is having example that will help.
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Ex: ST -- BP1
BP2
BP3
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Srini

Hi,
I don't think its possible to create fieldcatalog for different tables,
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populate the data from different table to that dummy table
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Hi,
I want create a pdf report,which contains a table cell occupied more than one line.
just like html language: <rowspan = 2>
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Hi,
I want create a pdf report,which contains a table cell occupied more than one line.
just like html language: <rowspan = 2>
merge cells in one row is allowed,we can use merge cells command(like colspan in html).
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I have tried OLAP until now with only one fact table.
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ODDS
:: ... and still have a very poor performance ...

1.
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I have built cubes, created a java client and a jsp client.
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Here's link to someone who did a lot with tables. Not sure about multiple buttons, but it should get you started.
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Hi,
I need to have more than one Detail table in Master Detail Forms.
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Sincerely yours,
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You can do one of two things
1) Depends on the nature of your data model. I was able to manage many to many
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2)Works for situations where master record exists. create a page with mulitple portlets syncronized on some related key.
create the following package to use on the md forms to place on the one page to be rendered.
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create or replace package session_var
IS
session_parms portal30.wwsto_api_session;
g_domain varchar2(2000) := portal30.wwctx_api.get_user;
function get_id (id in varchar2) return number;
PROCEDURE SET_ID
(ID in VARCHAR2
,p_val in VARCHAR2
,P_URL in VARCHAR2
END SESSION_VAR;
create or replace package body session_var
IS
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l_store_session portal30.wwsto_api_session;
l_id number;
begin
l_store_session := portal30.wwsto_api_session.load_session(
p_domain => session_var.g_domain,
p_sub_domain => 'your domain');
l_id := l_store_session.get_attribute_as_varchar2( p_name => id);
return l_id;
end get_id;
PROCEDURE SET_ID
(ID in VARCHAR2
,p_val in VARCHAR2
,P_URL in VARCHAR2
IS
l_store_session portal30.wwsto_api_session;
begin
l_store_session := portal30.wwsto_api_session.load_session(
p_domain => session_var.g_domain,
p_sub_domain => 'your domain');
l_store_session.set_attribute(
p_name => id,
p_value => p_val );
l_store_session.save_session;
* Redirect to the page using p_url;
portal30.wwv_redirect.url(P_URL);
end set_id;
END SESSION_VAR;
--the form master detail form, section before display page enter the following code and publish as portlet.
declare
l_fs varchar2(4000);
l_s varchar2(4000);
v_con_id number;
begin
v_con_id :=rfq.session_var.get_id('CON_ID'); -- primary key and key used to relate details
p_session.set_shadow_value( p_block_name => 'MASTER_BLOCK',
p_attribute_name => 'A_CON_ID', -- attribute on form related to primary key
p_value => '= '|| v_con_id,
p_language => portal30.wwctx_api.get_nls_language ,
p_index => 1
l_fs := p_session.get_value_as_varchar2(p_block_name => 'MASTER_BLOCK', p_attribute_name => '_FORM_STATE');
l_s := p_session.get_value_as_varchar2(p_block_name => 'MASTER_BLOCK', p_attribute_name => '_STATUS');
if l_fs = 'SAVE' and l_s is null then
WWV_MASTER_GENSYS_1(p_block_name => p_block_name,
p_object_name => p_object_name,
p_instance => p_instance,
p_event_type => p_event_type,
p_user_args => p_user_args,
p_session => p_session);
p_session.save_session;
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WWV_MASTER_GENSYS_1(p_block_name => p_block_name,
p_object_name => p_object_name,
p_instance => p_instance,
p_event_type => p_event_type,
p_user_args => p_user_args,
p_session => p_session);
p_session.save_session;
end if;
exception
when others then
PORTAL30.wwerr_api_error.add(PORTAL30.wwerr_api_error.DOMAIN_WWV,'app','generic','onLink', p1 => sqlerrm);
raise;
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-- create a form (form_session_vars) to call procedure session_vars and place the following code in the
addiontional pl/sql tab
WWV_GENSYS_1(
p_block_name => p_block_name ,
p_object_name => p_object_name,
p_instance => p_instance ,
p_event_type => p_event_type ,
p_user_args => p_user_args ,
p_session => p_session);
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--create a link and target the form_session_vars and in the link target inputs
enter the values for your user parameters
id= CON_ID --"your primary key name"
p_url= url/page/"your_page"
--finally create a report (QBE or standard).
in the column formation section use the link created earlier to direct the user to the target page.
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When the link is selected the form_session_Var is called and automatically runs setting the primary key values
in the user session store. The step is required or the resulting page will not render properly. Then the user is redirected to the page where the portlets are rendered. The portlets start rendering, the before display page calls the session vars package to retrieve the key and put the form into query_update mode returning the data.
The portlets finish in query_and_save mode with details in update mode, the allowable insert, delete and none actions will be available for the details.
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Hi gurus
How to join more than one cluster table into one
amk

Hi,
You cannot join cluster tables
Best way is to select from the header table and then select from the item table table using for all entries of header table.
regards,
Advait

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can one notification be referenced by more than one PM order?
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Hi Zhang Bin
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Table referenced by more than one other table

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