One to Many relationship in Linking
Post Author: LaurieBorn
CA Forum: Data Integration
I am trying to link three files in Crystal. For every record in the primary file there may be several records in the other two files. I want all of the matching records in the second file, but only want to use the third file for a formula If statement. I did a left outer join to the primary and I did a left outer join from the second to the third file. With my current join I am getting duplicate fields from the second file based on the matching records in the third file. How can I access a record from the Third file to use in my formula without having an impact on how the records are printed from the other files?
Post Author: bhofmans
CA Forum: Data Integration
Looks like you posted this question to the wrong forum, please move this post to the Crystal Reports forum in order to get a better chance on replies : http://technicalsupport.businessobjects.com/cs/forums/13/ShowForum.aspx
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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
Item
A2:
A2_ID
SubItem
A1_ID
I have 2 forms (lets call it F1 and F2) that I use to capture data for A1 and A2.
On F2, I have the following fields that are setup to capture data:
A2.A1_ID
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A2.SubItem (user would enter SubItem)
Note: A2.A2_ID is populated using a SEQ
Everytime I pick **A1.Item on F2, is there a way to link to A1 table and display A1.A1_ID for every **A1.Item selected on F2?
If so, I want to store the value captured in F2 for the A1_ID field into A2 table to maintain my 1-to-MANY relationship.
If this will work, how do I go about implementing this solution?
Can someone help me?I think it sounds like you are asking for a Master-Detail form. Try that and see what you get.
chris. -
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
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I am creating this in Dreamweaver using a MYSQL database and PHP.>Would the following be a part of it:
>
>Outer join
Probably not. When updating/inserting/deleting from 2 tables you perform each seperately. Table updates may join two or more tables to resolve the correct row(s) but you still only update one table at a time. Procedurally you would create a transaction, update the first table, update the second table and then commit the transaction.
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How to implement one to many relationship between two Document Line Table
Hi,
I want to implement the following relationship into user defined tables:
Example Situation:
There are tables A, B and C.
For one record of Table A, there could be multiple records in table B.
For one record of Table B, there could be multiple records in table C.
i.e. A(1) -> B(n) [One to many relationship]
B(1) -> C(n) [One to many relationship]
finally: A(1) -> B(n) -> C(n)
How can I achieve this? If I make Table A as Document and table B & C as Document Line and then make them UDO, will it work? Kindly suggest me a solution.
Regards,
Sudeshna.Hi,
I think that the database representation is exactly what you ask for. 3 tables, A, B, C. A should have a UDF that is linked to B table, and B should have a UDF that is linked to C table.
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One to Many relationship in CMP
Hi,
How to create CMP entity bean that can map One To Many relationship?
Thanks.
(Actually, i have post this question in "Java programming" forum becoz i couldn't find the EJB link in forum main page...)Hello Friend,
Go carefully through the RosterApp example in the J2EE tutorial.
It sure is going to help you.
See each and every tab and the values in the deployment tool.
Best of Luck -
Persisting an instance of the many side of a in one to many relationship
It seems as if most books only tell you how to setup the relationship for a one to many relationship but seems to fail to tell you the appropriate way to persist in this relationship. So, I have a parent class with many child classes. Also, I am using services and so I am converting from Entities to Dtos and visa versa.
First, i want to insert a new child for the parent. Do I just convert the child Dto to a child entity and then persist the child entity with the reference to the parent? Then do I find the parent and add the child to the parents children so the entities are consistent?
Or do I do a find on the parent and add the child to the parents children list and the child. Will the child be persisted automatically?
With this said, what about updating a child? Do I remove the existing child and add a new one? or do I somehow find the child in the parents children set and update the info there and then somehow the child is persisted automatically? And since I am using Dto to entity, do I use a find to find the parent and then iterate through that parents children til I reach the child I modified by id somehow.
What about Many to Many relationships? With a middle join table? How does JPA know to remove a join if I change the child reference? Does it remove the old and insert the new? Or do I have to do it myself somehow. Which if the later then I really can not have a parent child Dto I really need a parent childlink table where the child is referenced by the linktable? The book I have been reading has not made this very clear.Hello,
The relationships cascade settings determine what should happen. I would not recommend persisting a new entity that references a non-managed entity. Instead either persist the child then make the associations or find the parent, make the associations then persist the child. In the second case, you do not need to explicietly persist the child if the parent->child relationship is marked cascade persist, since it will be found on flush or commit.
Since you are using DTOs, updates require you merge the changes. You can directly merge the child, and if it has a link to its parent, modify the parent to add the child on the managed child that gets returned.
As for ManyToMany, you must modify the side that controls the relationship. So if the parent owns it, then you must modify or merge the changes into the parent for the changes to be persisted to the database. If it is bi-directional, you must modify both sides so that the cache remains consistent with the database. This should be transparent to your application, and you only need an entity for the relation table if you want to map more complex information that doesn't fit into the JPA ManyToMany options. Otherwise, JPA should handle inserting and deleting enteries to the relation table for you.
Best Regards,
Chris -
Merge Two Reports in Excel Analyzer - One To Many Relationship
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However I have put these three queries in an Excel Analyzer workbook. All the user does is enter a cost centre when running the report. Each query is on a different sheet but what I'd like to do is merge the data on to the one sheet. I want to see the bill and it's payments from the AR data matched up with the cost assignment from the FI/CO data. This would be a one to many relationship e.g. one bill may have it's cost assignment split over more than one cost centre. Is there anyway to do this using simple excel functionality?
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Cost Centre 2345 £25
Anybody any ideas?Hi,
Thanks for your answers.
I did explore using infosets but really struggled with joining the data and getting a sensible output. For example where a bill was done in installments I was getting 12 lines (e.g. one for each month) rather than just one. THis meant it looked liked they'd paid twleve times as much etc.
I did also try report to report. Which to my mind worked ok. Except the customer wanted it all in "One" report rather than having to drill down to see data.
I'll try a multiprovider but I'm worried that I'll end up with similar issues as I had when using the infoset.
Cheers
Joel -
Create One-to-Many Work Item Links Programmatically in TFS 2013
Hello,
I urgently require some help with this problem please.
I have a number of existing work item types - for illustration purposes, let's call them Work Item Parents and Work Item Children. Remaining details are as follows:
I have thousands of Work Items of type Parents
I have hundreds of Work Items of type Children
The Work Item Parents have a One to Many relationship with the Work Item Children
Both Work Item types have already been added to TFS and we now need to associate or link Parent items with their corresponding Child items.
Due to the sheer number of items described above, linking the Parent items with their respective Child items would be a complete "No-No" as it could take forever to complete and would be prone to error.
What I'm therefore seeking is the ability to programmatically associate or link the two work item types where required.
Any advice on how to achieve this would therefore be greatly appreciated.
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Thanks for your reply.
We can get the wanted Bug work items and Task work items using
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TfsTeamProjectCollection tfs =
new
TfsTeamProjectCollection(new
Uri("collectionURL"));
tfs.EnsureAuthenticated();
WorkItemStore workitemstore = tfs.GetService<WorkItemStore>();
try
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string wiql =
"SELECT [System.Id] FROM WorkItems WHERE [System.TeamProject] = 'teamprojectname'
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[System.Tags] CONTAINS 'b1'";
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string wiql2 =
"SELECT [System.Id] FROM WorkItems WHERE [System.TeamProject] = 'teamprojectname'
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[System.Tags] CONTAINS 't1'";
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for(int
i =0;i<=4;i++)
//define the link type
WorkItemLinkTypeEnd linkTypeEnd = workitemstore.WorkItemLinkTypes.LinkTypeEnds["Related"];
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Bwic[i].Links.Add(new
RelatedLink(linkTypeEnd, Twic[(i * 2)].Id));
Bwic[i].Save();
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RelatedLink(linkTypeEnd, Twic[(i * 2 + 1)].Id));
Bwic[i].Save();
catch(Exception
e)
Console.WriteLine(e.Message);
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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
kartikHi,
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. -
How to change the fetch size for a one-to-many relationship
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So, is this possible? How ?In TopLink 10.1.3 you can set the fetch-size on any query, it has nothing to do with using a ScrollableCursor.
Example:
readQuery.setFetchSize(100);
To set the fetch size on a mapping query use,
mapping.getSelectionQuery().setFetchSize(100);
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Newbie: one to many relationship SQL error
Greetings all-
This is probably a slam dunk for you JDO experts. I'm a JDO newbie, working
with an existing schema in MySQL. I have a one to many relationship between
two tables:
Table "company":
Fields:
company_id: int(11) -- primary key
name : varchar(64)
division : varchar(64)
Table "company_products"
Fields:
company_id: int(11) -- foreign key to table company
product_name: varchar(64)
product_description: varchar(64)
So, I created the corresponding classes:
public class Company {
private int companyID;
private String company_name;
private String division;
// Array of CompanyProduct
private ArrayList companyProducts;
// .. methods omitted
public class CompanyProduct {
private int companyID;
private String productName;
private String productDesc;
// Methods omitted
Then I created the "package.jdo" file:
<?xml version="1.0"?>
<jdo>
<package name="com.packexpo.db">
<class name="Company">
<extension vendor-name="tt" key="table" value="company"/>
<extension vendor-name="tt" key="pk-column" value="company_id"/>
<extension vendor-name="tt" key="lock-column" value="none"/>
<extension vendor-name="tt" key="class-column" value="none"/>
<field name="companyID">
<extension vendor-name="tt" key="data-column" value="company_id"/>
</field>
<field name="name">
<extension vendor-name="tt" key="data-column" value="name"/>
<extension vendor-name="tt" key="column-length" value="64"/>
</field>
<field name="division">
<extension vendor-name="tt" key="data-column" value="division"/>
<extension vendor-name="tt" key="column-length" value="64"/>
</field>
<field name="companyProducts">
<collection element-type="com.packexpo.db.CompanyProduct"/>
<extension vendor-name="tt" key="inverse" value="companyID"/>
</field>
</class>
<class name="CompanyProduct">
<extension vendor-name="tt" key="table" value="company_product"/>
<extension vendor-name="tt" key="pk-column" value="company_id"/>
<extension vendor-name="tt" key="lock-column" value="none"/>
<extension vendor-name="tt" key="class-column" value="none"/>
<field name="companyID">
<extension vendor-name="tt" key="data-column" value="company_id"/>
</field>
<field name="productName">
<extension vendor-name="tt" key="data-column" value="product_name"/>
<extension vendor-name="tt" key="column-length" value="64"/>
</field>
<field name="productDesc">
<extension vendor-name="tt" key="data-column"
value="product_description"/>
<extension vendor-name="tt" key="column-length" value="64"/>
</field>
</class>
</package>
</jdo>
Enhancement works fine. I successfully query and retrive Company objects
from the database, but as soon as I try to get the list of CompanyProducts,
I get an SQL Error:
javax.jdo.JDODataStoreException: [SQL=SELECT company.COMPANYPRODUCTSX FROM
company WHERE company.company_id = 82061]
E0610 Error in executeQuery()
E0606 executeQuery() error --
E0701 Error in getResult().
E0708 Command results in error - 1054 Unknown column
'company.COMPANYPRODUCTSX' in 'field list'
NestedThrowables:
com.solarmetric.kodo.impl.jdbc.sql.SQLExceptionWrapper: [SQL=SELECT
company.COMPANYPRODUCTSX FROM company WHERE company.company_id = 82061]
E0610 Error in executeQuery()
E0606 executeQuery() error --
E0701 Error in getResult().
E0708 Command results in error - 1054 Unknown column
'company.COMPANYPRODUCTSX' in 'field list'
I know i have probably set up the package.jdo file incorrectly, but I'm at a
loss for what I did wrong.
Any suggestions?
Thanks!
-MikeHi,
915766 wrote:
I need to write sql for below requirement:
table structure is
serial no LPN
1 4
2 4
3 6
4 6
5 6
6 3
7 3
8 3
9 1
I have to pick distinct 'LPN' like below:That sounds like a job for "GROUP BY lpn".
(any serial no can be picked for the distinct LPN)It looks like you're displaying the lowest serial_no for each lpn. That's easy to do, using the aggregate MIN function.
results needs to be as below:
serial no LPN
1 4
3 6
6 3
9 1
Please suggest with sql.Here's one way:
SELECT MIN (serial_no) AS serial_no
, lpn
FROM table_x
GROUP BY lpn
ORDER BY lpn -- if wanted
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using (e.g., 11.2.0.2.0).
See the forum FAQ {message:id=9360002} -
Toplink one to many relationship
I am working on DAO layer for One to many relationship
how can we get the list child objects based on parent id..
we are using toplink ...Hi,
If you are using with JPA, try this:
em.createQuery("select c from child c where c.parent.id = :id").setParameter("id", parentObject.getId())
.getResultList(); -
Summarizing data in a one-to-many relationship
Post Author: Bob Amiral
CA Forum: General
I use an order tracking system that has a one to many relationship between the main order information file and the line items file. For each order, there can be one or more items in the items file. I am having no luck trying to summarize data in such a way that shows selected information from the order file with only a summary from the item file on one line. Instead, the reports expands by adding a line for each and every entry from the item file that relates to the order.
How can I summarize data from the item file to show only one line of item data in the same line as the order data?Post Author: Charliy
CA Forum: General
Group by Order #
Suppress the Detail (and possibly the Group Header, depending on how you want it to look)
Put Running Totals in the Group Footer that reset on change of group.
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