Identify Entities for Logical Data Model

Hi,
I donno exactly this is the correct forum for this question. I believe there are database experts here to help me on this.
I am in confusion that, phsically the data can be saved in a set of tables (4-5 tables). But different views (User Interfaces) and reports can be created from these tables.
Assume that,
View1 - Uses all tables
View2 - uses only 3 tables
View3 - uses only 1 table
Report 1 - uses only 2 tables
Report 2 - uses only 4 tables
Should my Logical Data Model reflect all these view1, view2, view3, Reprt1 and Report2?
How exactly do we need to identify the entities for Logical Data Model?
Could you please any one help me on this?
Thanks & Regards
M Thiyagu

sorry, i couldnt understand your query..
thanks,
baskar.l

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Creating Entities for this data model

Hi guys,
I have these 3 tables:
create table employee_a
( employee_id int not null primary key ,
first_name varchar(50) not null ,
last_name varchar(50) not null )
create table manager_b
( id int not null primary key ,
manager_employee_id int not null foreign key references employee_a(employee_id) ,
subordinate_employee_id int not null foreign key references employee_a(employee_id) )
create table user_c
( user_id varchar(20) not null primary key ,
user_password varchar(100) not null ,
employee_id int null foreign key references employee_a(employee_id) )* All the employees are defined in employee_a table.
* If an employee is also a manager then its defined in manager_b table. That employee's id is defined in manager_employee_id column while his/her's subordinates employee ids are defined in subordinate_employee_id column.
* All the users of the system are defined in user_c table. If user of the system is also an employee then its defined in employee_id column of user_c table. If user of the system is not an employee then employee_id column is blank of user_c table.
The data may be like this:
insert into employee_a values (1, 'Mark', 'Benson')
insert into employee_a values (2, 'Joe', 'Young')
insert into employee_a values (3, 'Robert', 'Carbone')
insert into employee_a values (4, 'Wendy', 'Swistenenko')
insert into employee_a values (5, 'Tony', 'Lapolla')
-- Joe Young is manager of "Robert Carbone" and "Tony Lapolla"
insert into manager_b values (100, 2, 3)
insert into manager_b values (101, 2, 5)
-- Wendy Swistenenko is manager of "Mark Benson"
insert into manager_b values (102, 4, 1)
-- Users of the system who are also employees
insert into user_c values ('bensonM', 'password', 1)
insert into user_c values ('youngJ', 'test', 2)
-- A user of the system who is not an employee
insert into user_c values ('guest', 'pretty', null)My question is how to define Entities for these 3 tables for JPA. I am concerned about Inheritence Strategy to use.
Thanks

sorry, i couldnt understand your query..
thanks,
baskar.l

Creating Time dimension in BW data model. - like seen in logical data model

Hello all,
I have been struggling with this thing and I am looking for some help from anyone on this forum.
We are trying to create a logical data model of our bw system. We are going live next month with Student module for universities. We have multiple Infocubes and DSO and since there is so much crossing over in between them most of the reporting is done on infosets.
One of the thing we were thinking; is it possible to create something like a common time dimension table for every infoprovider. Basically when we are providing the reports to the end user can we give them a drop down menu which gives a time frame for reporting rather than selecting.
Example: Like can we create something which looks in the drop down like current month data, last months data, three months ago, four months ago, five months ago, one year ago, two years ago. Can we make like these data slices in our cube and deliver it to the end user?
We have in our cube a few date infoobjects, like receipt date, decision date, cancellation date and like wise.
Please let me know if any one has done any similar thing, it will be very helpful.
Thank you so much in advance.

if you add your common time dimension to your data model, first identify for each infoprovider the time against which 'current month' and other frames should be applied and map them to your dimension.
just a question... are you not using time dimension in cubes ? ideally this should be your time dimension llinking all.
when you use time dimension which uses 'current month' , 'current year' , you will have to address their historisation as well. (because current month now will not be so current after 2 months).
so in data load procedure every day these values need to change (meaning drop and reload).
and routines to populate these values based on reporting date.
Edited by: hemant vyas on May 6, 2009 1:56 PM

Repeating groups in logical data model

Hello,
I am trying to create a logical data model where the following rules are applied:
Each Renovation Job may include one or more Rooms.
Each Room can be included in one or more Renovation Jobs.
Each Room Renovation may have one or more Renovation Types
Each Renovation Type may be associated with one or more Room Renovations
The following is a list of tables and their values I have created to support the above (Renovation_Jobs, Room_Codes, Renovation_Type_Codes, Renovation_Room_Types). I put tables "Renovation_Jobs" + "Room_Codes" + "Renovation_Type_Codes" having a one to many relationship to intersection table "Renovation_Room_Types". There are repeating groups in "Renovation_room_type" table (Renovation_job + Room_codes), does this mean I have to create another intersection table for this as well?
Renovation_Jobs:
1
2
3
Room_Codes:
Kitchen
Bedroom
Living Room
Renovation_Type_Codes:
Paint
Replace carpet
Replace light fixture
Renovation_Room_Types:
1     Kitchen     paint
1     Kitchen     Replace light fixture
1     Bedroom     paint
1     Bedroom     Replace carpet
1     Bedroom      Replace light fixture
1     Living room     Paint
1     Living room     Replace carpet
2     Kitchen     Paint
2     Kitchen     Replace light fixture
3     Kitchen     Paint
3      Bedroom     Paint
3     Bedroom     Replace carpet
Any help would be appreciated.
thanks

Each Renovation Job may include one or more Rooms.
Entities - Renovation Job Room, Room Renovation (intersection between Renovation Job & Room)
Each Room can be included in one or more Renovation Jobs.
Covered by Room Renovation
Each Room Renovation may have one or more Renovation Types
Entities - Renovation Type, Renovation Room Type
Each Renovation Type may be associated with one or more Room Renovations
Covered by Renovation Room Type
There are repeating groups in "Renovation_room_type" table (Renovation_job + Room_codes)That's just your foreign key to Room Renovation, isn't it?
You said that each renovation type may be associated with one or more room renovations.

Need tips to build a Logical data model

Hey Gurus,
1) I need some tips in building a logical data model.
I have reviewed a functional spec and listed all the fields required in a report. I now looked into datasources( extractor) in R/3 side which can bring most of these fields but there are certain characteristices which are not part of this extractor, what i have found out is that they are the attributes of a master Data <u>but there are still some more fileds which are not part of the extractor and attributes of a master data</u> , so now how do i bring the data for those fieds????? <b>Do I have to enhance the extractor or do i need to enhance the Masterdata???????</b>
How do i decide whether to enhance the extractor or the Master data?? Experts please give me some tips out of ur experiences so that i can decide on what to enhance.
2) Assume that i have an extractor which can bring me all the fileds required in a report. Now how do i build a logical data model????????
is it like
Replication Transformation/DTP Transformation/DTP
DS-->PSA> ODS--
>IC
Am I right else correct me gurus.
Will surely award points.
thanks.

1. Use XML Spy Enterprise edition editor.
2. Goto www.xmethods.com, select service you want to create demo of.
3. Get its WSDL url.
4. In XML Spy SOAP menu there is a command 'create new soap request'. Press that, enter the WSDL url. You will get a SOAP request.
5. Edit SOAP request parameters. Type parameters of your choice.
6. Press 'send request to server'. You will get SOAP response. It will contain result from the requested method.
7. Paste that response inside a JSP.
8. Write a local method which will return same response (remote method's return value) that came from remote web service.
9. Paste that method inside abovementioned JSP. Replace static response in that JSP with the response generated by local method. The method parameters will come from client's SOAP request. Parse SOAP request to get request parameters. (As it's your demo, you know the data types of the parameters).
10. Host that JSP on any Servlet/JSP engine.
That makes your Web Service.
You can use any package like Aapche SOAP, AXIS or JAX-RPC to generate a SOAP client. Use the URL of JSP(step 10) as "endpoint".
Note: Indside JSP make sure that there in no endline and carriage return character. Otherwise it won't be a valid SOAP response.
Good luck.

Logical data model

hi
I am currently making a white paper on rdbms and logical data models. Can anyone point from where can I get a logical data model for the telecommunication industry for data warehousing purposes ???
regards
Kunal Choksi

Instead of using exploit like that, I prefer to find a way to represent reality more generally. In the following model for example it is possible to specify also the reason for the end of a marriage ( divorce,death of partner, annulment, alimony ) in the right table.
CREATE TABLE PERSONS (
     PERSON_ID NUMBER PRIMARY KEY,
CREATE TABLE MARRIAGES (
     MARRIAGE_ID NUMBER PRIMARY KEY,
     BEGIN_DATE DATE NOT NULL,
CREATE TABLE OLD_MARRIAGES (
     MARRIAGE_ID PRIMARY KEY,
     CONSTRAINT DIVORCES_MARRIAGE_FK
          FOREIGN KEY (MARRIAGE_ID) REFERENCES MARRIAGES,
     CAUSE_OF_END VARCHAR2(N) NOT NULL, --<--- DIVORCE,DEATH,...WHATEVER
     END_DATE DATE NOT NULL,
CREATE TABLE ACT_MARRIAGES_RELATIONS (
     PERSON_ID NUMBER NOT NULL,
     CONSTRAINT ACT_MARRIAGES_PERSON_FK
          FOREIGN KEY (PERSON_ID) REFERENCES PERSONS,
     MARRIAGE_ID NUMBER NOT NULL,
     CONSTRAINT ACT_MARRIAGES_MARRIAGE_FK
          FOREIGN KEY (MARRIAGE_ID) REFERENCES MARRIAGES,
     CONSTRAINT ACT_MARRIAGES_PERSON_UNQ
          UNIQUE (PERSON_ID)
CREATE TABLE OLD_MARRIAGES_RELATIONS (
     PERSON_ID NUMBER NOT NULL,
     CONSTRAINT OLD_MARRIAGES_PERSON_FK
          FOREIGN KEY (PERSON_ID) REFERENCES PERSONS,
     MARRIAGE_ID NUMBER NOT NULL,
     CONSTRAINT OLD_MARRIAGES_MARRIAGE_FK
          FOREIGN KEY (MARRIAGE_ID) REFERENCES DIVORCES
/The two tables to represent marriage_relations (actual and old ones) are there only because with this choice it is possible to specify a unique constraint on actual marriages that avoids the same person to be related in different marriages.
Bye Alessandro

Creating a logical data model in BPA 11g

Hi,
Can we create a logical data model in BPA 11g? If we can do that can it be moved over to the BPM environment seamlessly. I was under the impression that during the modelling exercise a business analyst would develop process models and logical data models in BPA & the turn it over to IT developers who will pull these models in and develop the implementation. Is that how it works?
Thanks.

You can create a logical datamodel in BPA suite. The sample applicaton has an example of that: the quote to cash datamodel. There are different types of datamodels that you can create (business objects, entities etc).
Examples of datamodels can be found in the sample: OBPA Release 11. quick start.
The datamodels can't be imported I think, the process models can. You can either import them into Oracle BPM Studio (as executable BPMN) or into Oracle SOA Suite (transforms it into BPEL) with JDeveloper.
Regards,
Lonneke

Logical data Model Using ODI

Can I create Logical data Model Using ODI ? If yes how can I do it ?

User,
ODI is not a tool to design. It's a comprehensive integration platform.
However if you would like to model your data, you can use for example Oracle Designer 9i, which is availble one the Oacle website for free.
Oracle 10gR2 Designer is also availble at: http://www.oracle.com/technology/software/products/designer/htdocs/winsoft.html
Good luck.
Edited by: kumper on 2008-10-16 00:33

Information on logical data model.

Hi All,
Can anybody through some light on what is a logical data model, how it should be
created?
Please share documents if any.
Regards,
Pramod

Hello Pramod,
you can refer the below links for data modeling:
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/5d4211fa-0301-0010-9fb1-ef1fd91719b6
http://www.sap.info/public/INT/int/index/Category-28943c61b1e60d84b-int/0/articlesVersions-31279471c9758576df
Regarding the Logical Data Modeling, you can refer the below link for basic understanding:
http://en.wikipedia.org/wiki/Logical_data_model
Hope this will help you.
TNR,
Saurabh...
Reward if found useful.
Edited by: Saurabh Kumar Sahu on Jul 28, 2008 10:11 AM

How Can I include a logical data model in a Data Flow Diagram?

Hi,
I have done a logical data model and now, I want to include it in a data flow diagram. I do not know which element I should use to make this relation.
Thanks,

Hi,
you need to create "Information structure" in the flow properties dialog and then can assign attributes to that information structure in its properties dialog
Philip

Logical Data Model Vs Physical Data Model

Hi guys, what is the difference between, logical data model and physical data model.

Duplicate Thread:
Logical Vs Physical Data Model
Daljit Singh

Could anybody share me Oracle modules Logical Data Model?

Who have Logical Data Model charts on oracle financials modules like AR and FA? I need it. Thank you!

yes,
i have 12 years experience of Computer Expert Accounting System. I have gained good knowledge on System Design
[email protected]

How to attach jkm for a data model?

please suggest me.....
i want to use journalizing for a data model so i need to give jkm for that how can i give jkm in the journalizing tab of that particular model

Hi,
You need to import the JKM into your project .
Then goto your model --->journalizing tab and select your JKM imported in the project .
Thanks,
Sutirtha

Call Multiple RTF for same data model

How call two templates for the same data model.
what is the logic i have to use in the rtf template.
Thanks in Advance

Your RTF template will use the data model you defined.
So no logic than just inserting the xml elements your data model provides.
You can associate multiple templates to one data model. At runtime you will have the opportunity to select
the template of your desire to run the data against.
If you want this process to be automated then you will have to user bursting and for that you need to read this:
http://download.oracle.com/docs/cd/E14571_01/bi.1111/e13881/T527073T555155.htm#T555156
Cheers
Jorge
p.s If this answers your question then please grant the points and close the thread

T code for logical data base

Hi
could pls let me know the Tcode to look for the logical data base in sap r/3
Thanks
P

Hello,
SE36
Regards
Saket Sharma

Identify Entities for Logical Data Model

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