One to One relationship

Oracle 11.0.1.7:
Is it ok to have foreign key as primary key in one to one relationship? Is there any drawbacks? I have 2 options:
1. Create sequence primary key
2. Or make foreign key as primary key
Which one is better and why? I like # 2 just because I don't have to create extra index, sequence and column.

user628400 wrote:
Oracle 11.0.1.7:
Is it ok to have foreign key as primary key in one to one relationship? If the relationship is truely one-to-one, then you haven't properly normalized your data.
"Every nonkey attribute must be functionally dependent upon
     the key, (1NF)
     the whole key, and (2NF)
     nothing but the key, (3NF)
     so help you Codd."
Is there any drawbacks? I have 2 options:
1. Create sequence primary key
2. Or make foreign key as primary key
Which one is better and why? I like # 2 just because I don't have to create extra index, sequence and column.

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One to one relationship between records while entering in MDM data manager?

Example Scenario::
 I have created Employee details(main table) and Salary (look up flat table for employee number filed in main table) . Tried to get the corresponding employee's gross salary from salary table to employee Details table basing on Employee number field in Employee Details table as Gross salary and Employee number are common fields for both the tables. But i could not get one to one relationship in this case , Please explain how to achieve?

Employee Details (Main Table)
 EmpNo(Look up field) EmpNa GrossSal(Look up field)
Salary Details (Look Flat Table)
 Empno Basic Sal GrossSal
 012 5000 10000
 013 4000 8000
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ONE-to-MANY relationship between tables and forms in APEX

I recently started using APEX and I have run into an issue.
I have a ONE-TO-MANY relationship between two tables, A1 and A2, respectively.
A1:
A1_ID
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A2:
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SubItem
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I think it sounds like you are asking for a Master-Detail form. Try that and see what you get.
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Urgent : java bean having bidirectional one to many relationship

Hi,
We have complex requirement in our application.
We need to copy java bean having bidirectional one to many relationship to another javabean having bidirectional one to many relationship..
E.g
Class Basket1 {
public String color;
pubic String type;
public List<Basket1> basketList = new ArrayList()
Class Basket2 {
public String color;
pubic String type;
public List<Basket2> basketList = new ArrayList()
We need to exact copy Basket1 to Basket2. We are in trouble to copy List of child because we do not have how many child Basket1 have of same type..
Can someone help us how we can implement such kind of complex object bidirectional one to many relationship??

I can't see anything bidirectional about these relationships. What I can see is a couple of BasketN classes that look identical so I don't know why they both exist, and they both contain lists of themselves as members, which suggests some kind of tree structure. Nothing bidirectional there. I can see tat these things can form circular object graphs but I don't see why you would want to do that.
We need to exact copy Basket1 to Basket2And I don't know what that means. Please explain.

How to insert data in a one-to-many relationship

How do you insert data into the client, my model entity beans have a one-to-many relationship.
PARENT ENTITY BEAN
PARENT-ID
PARENT-NAME
The ejbCreate(Integer parentID,String name)
CHILD ENTITY BEAN
CHILD-ID
CHILD-NAME
PARENT-ID(foreign key of PARENTID).
ejbCreate(Integer parentID,String name,String foreignparentID)
In a jsp page i collect the parent details and 3 corresponding chld details in a text box.
Can you please tell me how do i proceed from here...
ie. how to i insert data into the entity beans..
Do i pass the child as a collection, and within parents ejbCreate() method do i lookup for the childs home interface and insert one -by -one from the collection.
1. Considering the above example, can some one pls tell how the ejbCreate() mehod signatures, for the parent and child entity beans should be.
2. Pls also show some sample client code as to how to make an insertion.
3. In case you are passing a collection of child data, then in what format does one have to insert into a collection and also how does the container know how to insert the values in the child table , bcoz we are passing as a collection.
4.In case collections cannot be inserted do we need to iterate into the collection in parent's ejbCreate() method, and manually insert into the database of the childtable, thereby creating child entity beans.
Thanks for your time and support...
regards
kartik

Hi,
3. In this case of course child's ejbCreate(and postCreate) looks like
ejbCreate(Integer childID,String name,ParentLocal parent) {
setId(Id);
setName(name);
ejbPostCreate(Integer childID,String name,ParentLocal parent) {
setParent(parent);
Here you don't need IDs, but it happens only using Locals, not Remotes, if I'm not wrong. Container does it itself.
1. Of course, if you have parent.getChildren() and parent.setChildren() then you don't need any loops, but it should be done anyway in postCreate, because in ejbCreate there no parent exists yet.
Once more 3: example - I'm using JBoss 3.2.5 as EJB container. It has tomcat inside and EJB and JSP+Struts use the same jvm. It means for me that I don't need to use remote interfaces, just locals. And in this case I can implement ejb-relations. So, a have the abstract method parent.getChildren() which returns Collection of ChildLocal - s and method parent.setChildren(Collection childrenLocals) which creates/modifies children by itself.
I have not used remotes for a long time, but as I remember it was not possible to implement ejb-relations using remotes.
regards,
Gio

Struggling with a one to many relationship in a sub-report

Post Author: Scott_tansley
CA Forum: General
I have a database schema as per below: tblENQUIRY tblDatasheets tblReportParasIRSID (PK) 1 --> & IRSID (FK) UID (PK)Attribute1 SHEETID (PK) 1 > & SHEETID (FK)Attribute2 Attribute1 LIST_ORDER tblStandardParasAttribute3 Attribute2 PARA_CODE (FK) & < 1 CODE (PK)etc... Attribute3 TEXT etc...
The PROBLEM I am a Crystal Reports Newbie, and having to work through things bit by bitu2026 I've managed to achieve quite a lot, but I'm totally stuck with this and would appreciate some help. I need to create a report (essentially a letter and some datasheets) around a one-to-many relationship, which I have managed to compile using a main report (for the one [tblENQUIRY]) and sub report (for the many [tblDatasheets]). Essentially I need a covering letter, then the u2018manyu2019 datasheets, and then a number of other pages (which are largely static text). I have created a main report which includes the covering letter, holds a subreport for the datasheets, and then contains the text for the additional pages. This all works fine, and I get the correct number of datasheets for each main report. My problem stems from the use of this sub report. This sub-report needs to hold some attribute values for each datasheet, which is fine. However, on each datasheet page I need to have some paragraphs, which are held in another one to many relationship. Each datasheet may have up to six paragraphs held as a code in tblReportParas, with a relationship to the text as held in tblStandardParas. My original thought would have been to embed another sub report, containing the values from tblStandardParas!TEXT, into the first sub report. However, I have found that it is not possible to have a sub-report inside another sub-report. I had seperated the first sub-report out from the main report, and then embedded another sub-report into it. This worked fine until I tried to stitch the sub-report back into the main report (at which point the sub-sub-report dissapeared from view). I have therefore reworked my sub-report a little, and the attribution is now stored in a pageheader, with the tblStandardParas!TEXT in a detail section below it. This almost works! The only problem is that there is no relationship between the pageheader and detail sections. To clarify, I would expect to have one datasheet, with the attribution at the top, and then the six paras below. Then, the same on the next page (assuming there is a second datasheet) for that report. Instead, I get the correct attribution, but the detail section actually gives every paragraph in the database, no matter which datasheet/or report it related to! I therefore need to limit the detail section to only show those paragraphs where the SHEETID in tblReportParas is the same as the tblDatasheets SHEETID. Any offers of advice would be appreciated.

Post Author: Scott_tansley
CA Forum: General
I managed to resolve this myself in the end. I moves the tblEnquiry data into report header/footer sections, this allowed me to add the tblDatasheets information into the details section, which gave me multiple pages - and then finally, the Paragraphs were added through the use of a sub report.
There's probably an even better way, but for now it works, it's quick - and so I'm going to go with it!
Thanks for your interest.

One way trust relationship between different domain windows server 2012 in different forest

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connected to the same LAN. The forest level in A.local
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is Windows server 2012.
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ihab

Hi,
yes i already do it the setup conditional forwarding between the 2 domains and
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How do I create a One to many relationship page in Dreamweaver?

How do I create a page in dreamweaver that comes up after the user logs in from the log in page that will allow the user to:
Add, change and delete in 2 tables that are in my MYSQL database that is a one to many relationship
One thing that is confusing is how the foreign key that links to the one side of the relationship is created in the many side without the user inputting the foreign key each time adding information to the many side table.
I am creating this in Dreamweaver using a MYSQL database and PHP.

>Would the following be a part of it:
>
>Outer join
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EDIT: Well I take back my last comment. I see that MySQL does seem to support multiple table updates. I don't use MySQL so I can't really help you on that but the MySQL manual gives pretty clear syntax.

If Company has one to one relationship with Company code

Dear All,
If Company has one to one relationship with company code in the transaction system (ECC),
can we use company in place off company code - in the BCS system?
That is, in this case - under consolidation units
- company,
i will be using the ECC companies rather than ECC company codes as consolidation units.
Request your insights.
Cheers
Kumar

Actually, I almost always use the company, not the company code. The difference is in the different number of attributes, and the type CHAR 4 or 6. 0COMPANY is the standard infoobject for using in SEM-BCS.
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Having trouble with a one to many relationship in Crystal reports 11

I have an old report that I inherited. I have two main tables from which I draw data into this report: QAmonitortrack and monitorsperfm. I am correctly getting my data out of the QAmonitortrack table as the data relationships are one to one, but when I try to retrive data from the monitosperfm table, I only get one record back for each csrid. I am trying to calculate the number of [callid] in the monitosperfm table for the fiscal month. I have been through almost all of the table links and tried changing the link properties to give me more than one callid for each csrid I pulled out of qamonitortrack table.
Any suggestions?
Thanks...sql listed below:
SELECT "tblSupervisors"."LastName", "tblSupervisors"."FirstName", "tblCSR"."LastName", "tblCSR"."FirstName", "tblDirectors"."LastName", "tblDirectors"."FirstName", "tblSupervisors"."SupervisorID", "tblQAMonitorTrack"."CSR_ID", "tblQAMonitorTrack"."FiscalYear", "tblQAMonitorTrack"."FW_Month", "tblQAMonitorFWCalendar"."FiscalYear", "tblQAMonitorFWCalendar"."Fiscal_Month", "tblFM_BeginEndDates"."fm_start_date", "tblQAMonitorTrack"."FiscalWeek", "tblFM_BeginEndDates"."fm_end_date", "tblQAMonitorFWCalendar_1"."FiscalWeek", "tblQAMonitorFWCalendar_2"."FiscalWeek", "tblMonitorsPerFM"."callid", "tblMonitorsPerFM"."score", "tblQAMonitorFWCalendar"."FW_Start_Date", "tblQAMonitorFWCalendar"."FW_End_Date", "tblQAMonitorFWCalendar"."FW_Week_of_Month", "tblQAMonitorTrack"."CallsHandled", "tblCSR"."Group_ID", "tblPosition"."PositionDesc", "tblMonitorsPerFM"."dateofmonitor"
FROM ((((((((("SMG_APPS"."dbo"."tblQAMonitorTrack" "tblQAMonitorTrack" INNER JOIN "SMG_APPS"."dbo"."tblManagers" "tblManagers" ON "tblQAMonitorTrack"."Mgr_id"="tblManagers"."ManagerID") INNER JOIN "SMG_APPS"."dbo"."tblSupervisors" "tblSupervisors" ON ("tblQAMonitorTrack"."Sup_Id"="tblSupervisors"."SupervisorID") AND ("tblManagers"."ManagerID"="tblSupervisors"."ManagerID")) INNER JOIN "SMG_APPS"."dbo"."tblCSR" "tblCSR" ON "tblQAMonitorTrack"."CSR_ID"="tblCSR"."CSRID") INNER JOIN "SMG_APPS"."dbo"."tblFM_BeginEndDates" "tblFM_BeginEndDates" ON ("tblQAMonitorTrack"."FiscalYear"="tblFM_BeginEndDates"."fiscalyear") AND ("tblQAMonitorTrack"."FW_Month"="tblFM_BeginEndDates"."fiscal_month")) INNER JOIN "SMG_APPS"."dbo"."tblMonitorsPerFM" "tblMonitorsPerFM" ON ((((("tblQAMonitorTrack"."FiscalYear"="tblMonitorsPerFM"."fiscalyear") AND ("tblQAMonitorTrack"."FW_Month"="tblMonitorsPerFM"."fiscal_month")) AND ("tblQAMonitorTrack"."CSR_ID"="tblMonitorsPerFM"."csrid")) AND ("tblQAMonitorTrack"."Sup_Id"="tblMonitorsPerFM"."supervisorid")) AND ("tblQAMonitorTrack"."Process_Order"="tblMonitorsPerFM"."Process_Order")) AND ("tblQAMonitorTrack"."Mgr_id"="tblMonitorsPerFM"."managerid")) LEFT OUTER JOIN "SMG_APPS"."dbo"."tblQAMonitorFWCalendar" "tblQAMonitorFWCalendar" ON "tblQAMonitorTrack"."FiscalWeek"="tblQAMonitorFWCalendar"."FiscalWeek") LEFT OUTER JOIN "SMG_APPS"."dbo"."tblQAMonitorFWCalendar" "tblQAMonitorFWCalendar_1" ON "tblFM_BeginEndDates"."fm_start_date"="tblQAMonitorFWCalendar_1"."FW_Start_Date") LEFT OUTER JOIN "SMG_APPS"."dbo"."tblQAMonitorFWCalendar" "tblQAMonitorFWCalendar_2" ON "tblFM_BeginEndDates"."fm_end_date"="tblQAMonitorFWCalendar_2"."FW_End_Date") INNER JOIN "SMG_APPS"."dbo"."tblDirectors" "tblDirectors" ON "tblManagers"."DirectorID"="tblDirectors"."DirectorID") LEFT OUTER JOIN "SMG_APPS"."dbo"."tblPosition" "tblPosition" ON "tblDirectors"."PositionID"="tblPosition"."PositionID"
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ORDER BY "tblSupervisors"."SupervisorID", "tblQAMonitorTrack"."CSR_ID"

If the db is huge, you may want to copy it, and delete all but a few hundred rows.
Then you can play with the copy till you get the query doing what you want.
You might try changing this section
"tblQAMonitorTrack"."CSR_ID"="tblCSR"."CSRID") INNER JOIN "SMG_APPS"."dbo"."tblFM_BeginEndDates" "tblFM_BeginEndDates" ON ("tblQAMonitorTrack"."FiscalYear"="tblFM_BeginEndDates"."fiscalyear") AND ("tblQAMonitorTrack"."FW_Month"="tblFM_BeginEndDates"."fiscal_month")) INNER JOIN "SMG_APPS"."dbo"."tblMonitorsPerFM" "tblMonitorsPerFM" ON
To left outer joins.
Also, just create a connection to the tblMonitorsPerFM all by itself, run a query and see if you get multiple results directly from the DB...

Can Legal Entity - Operating Unit have One to One Relationship in R12

Hi,
I want to configure one Legal Entity to one Operating Unit in R12 as it was in 11i. ie One to One Relationship, How can I achieve this ?
Thanks in Advance,
Thejas

That is because you're not setting it, obviously. Nowhere in your code are you actually populating the order property of the orderlines.

How to change the fetch size for a one-to-many relationship

With Toplink 10.1.3, since using scrollablecursor is a prerequisites for changing the fetchsize on a query (using the setFetchSize), I am wondering if it would be possible to change the fetchsize of the query which is associated to a one-to-many relationship.
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Problem with cascade delete in CMP one-to-one relationship

I am not able to cascade delete for one-to-one relationship. Even though relationship seems to be setup correctly, record from the second table is not deleted.
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lrmc_dtl_id (Bean field islrmcDtlId)
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<cmr-field>
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<cmp-field-mapping name="moreLRMC">
<entity-ref home="LRMCDetail">
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<cmp-field-mapping name="mainLRMC">
<entity-ref home="LRMC">
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Pls. advice.
Thanks
Dhiraj

Is it happening because of this bug.
Cannot create a 1:1 bi-directional CMR for entity beans when database tables are reverse engineered. (2447364)
Anyone, any idea on this ?
Cheers,
Dhiraj

One to One relationship between Dimensions and Fact Tables

Hi,
Not a real Discoverer question, but seeing as there is such a huge pool of talent here, I thought I'd ask anyway...
Is the concept of having a one to one join between a Dimension and a Fact Table an Acceptable Thing (tm). I'm not talking about a degenerate dimension, as the Dimension would hold additional attributes.
It's something I'm trying to get my head around and would appreciate any viewpoints.
Thanks,
Andy

Hi Andy,
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Rod West

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Hi all
How to model a one to one relationship?
i have a scenario where i had to maintain 2 different entities and cannot merge them into a single table coz they are separate entities
Now while modelling them ... do we need to have a primary key for the second table (or)
use the primary key of the first table as the foreign key on the second table with Unique constraint on it .
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subscription table ........... and criteria table
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or allow include both in the criteria table
please suggest
Thanks and Regards
Raj

hi dportas,
first of all thanks for your respose...
what is reciprocal foreign key?
my scenario is like this
i have a table called subscriptions which records all subscriptions that we have subscribed to to receive an alert to our email primary key is subscriptionid.
every alert has an alert criteria with different set of attributes
hence i have 5 alert criteria tables... each with totlally different type of attributes
eg: balance criteria (balanceamount,condition) cutoff criteria(cutofftime,....)
we can subscribe to only one alert in a single subscription
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subscription to cutoff criteria table is 1-1
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Hi,
I am an new Jheadstart user and i am using Oracle Developer 10g with Jheadstart.
There are two tables in my database with a one-to-one relationship between them.
My database concept is that I need to have one table as a lookup of the other one. Jheadstart does not generate it that way because the relationship is not one-to-many, so I am not geting nor choice, nor lov.
Could this possibly be solved?

You probably get better answers in the JHeadstart forum.

One to One relationship

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