Stack Overflow
Stack Overflow

Questions tagged [datamodel]

According to Hoberman (2009), "A data model is a wayfinding tool for both business and IT professionals, which uses a set of symbols and text to precisely explain a subset of real information to improve communication within the organization and thereby lead to a more flexible and stable application environment.

In software engineering, the term data model is used in two related senses. In the sense covered by this article, it is a description of the objects represented by a computer system together with their properties and relationships; these are typically "real world" objects such as products, suppliers, customers, and orders. In the second sense, covered by the article database model, it means a collection of concepts and rules used in defining data models: for example the relational model uses relations and tuples, while the network model uses records, sets, and fields.

References:

584 questions
0
votes
1 answer

JavaFX2 observableList dataModel presentation String

I need some help, guys: The thing is that I want ListView> component to show .toString (or something similar) of the class of underlying dataModel (ObservableList> tests = FXCollections.observableList(list)) so in Java: public class…
greengold
  • 1,184
  • 3
  • 18
  • 43
0
votes
0 answers

Which method to update component on data change?

I have a component which displays property of some (external) bean. I.e. bean is backing the component. Now I want to update picture periodically. Of course I can write my own method to update. But may be there is one in ideology of swing? Which…
Suzan Cioc
  • 29,281
  • 63
  • 213
  • 385
0
votes
3 answers

Data model and datastore technology for fast multidimensional data lookup

I have a parent hashmap data structure having a string as key and having hashmap data structures as children (guess child1, child2, ..., childN). Each child is a simple key-value map, having a number as key and a string as value. In…
csparpa
  • 511
  • 2
  • 7
  • 19
0
votes
1 answer

Is there any tools that can generate the java code of a table's data model by parsing it's FXML describe file?

I have know how to create FXML file that describes a table. Meanwhile, according to Oracle Tutorial, it is a best practice to implement a class that defines the data model and provides methods and fields to further work with the table. However, It's…
Qinn
  • 31
  • 1
  • 4
0
votes
1 answer

Magento - automated order extract - EAV vs flat files

I want to build an automated routine that exports orders from Magento to another ERP. I started down the road of the magento SOAP/XML API's. However we are finding this solution slow for large numbers of orders. Now I realize that the flat order…
Mustapha George
  • 2,497
  • 9
  • 47
  • 79
0
votes
0 answers

Data modeling revisited - clinging to old identities?

I've been revisiting why I've been doing certain things in SQL Server 2005 data modeling. I've habitually used identities for table keys, making unique indexes for the actual data that should be unique instead of keying off that. So, if I had a…
Caveatrob
  • 12,667
  • 32
  • 107
  • 187
0
votes
1 answer

How to join two data models for google app engine in python

I am trying/lerning to make application in python that will have information about universitys and their departments. The problem I have is that I want to use data models, (I know very little about them). I want to have two databases. One will…
depecheSoul
  • 896
  • 1
  • 12
  • 29
0
votes
4 answers

PHP CMS data models - can they be changed?

I have a History of Art database with 30 tables and complex relationships between people (the sitters, artists, etc) and the works (paintings, sculpture, etc). Currently this is implemented in MS Access with about 5k lines of VBA code and 30 odd…
James Piggot
  • 417
  • 2
  • 7
0
votes
4 answers

Foreign Key in Entity Data Model

I use Entity Data Model but I have aproblem: If a table e.g Customers have categoryId(foreign key from table category) it is not appear in cutomers entity???? so how can i retrive this value or set it?
Wafaa
0
votes
1 answer

Update Data Model Business Entity

I have web application where Iam using linq to business entites i have business data model. the problem is : I have table with one column that it dosen't allow null value, when I try to update this table the folloeing error arise: error The property…
Wafaa
0
votes
0 answers

Chronological data model

On the twitter website if you click on the connect tab on the top of the screen (https://twitter.com/i/connect) you get this nice little chronological display of your tweets and when new people followed you, etc. I'm curious what could be the data…
eggie5
  • 1,920
  • 18
  • 25
0
votes
1 answer

How can i make queries for this Cassandra data model design

I got a doubt while designing data model in cassandra. i.e. I have created this CF Page-Followers{ "page-id" : { "user-id" : "time" } } I want to make 2 queries on the above CF. 1) To get all user-ids (as an array using multiget function of…
j.r.teja
  • 1
  • 1
0
votes
1 answer

How to Implement the Search functionality with in model objects in Android?

I am working on Android Application. Now I have requirement of search the entered string characters inside the object data model. here object data model i am creating with the data which is coming from webservice Xml. I am parsing the xml data and…
Ganesh v
  • 29
  • 1
  • 5
0
votes
3 answers

What kind of data model models function parameters and results?

The following table...: CREATE TABLE v ( height int, width int, depth int, volume int, PRIMARY KEY (height, width, depth); ) ... could be used to store the inputs and outputs of a function of 3 variables named volume:…
jl6
  • 6,110
  • 7
  • 35
  • 65
0
votes
2 answers

core data subquery

I have an an entity containing two optional to-many relationships (childA <<-> parent <->> childB). Each of these two child entities contain an optional string that I am interested in querying on. Using the same format, I get the results I expect…
stephen
  • 1,039
  • 14
  • 31
1 2 3
…
38 39