Data modeling for a small database tutorial - understand the part 'Creating relationships between entities'

Similar Questions

• Calculate the fastest path between 2 nodes with the data model for the Oracle network

  Hi all,
  
  I have Oracle 10 g 2.
  
  My problem is the following:
  
  I created a network named ITALIA_NET in the data model for the Oracle network.
  The table of links of this network is named: ITALIA_NET_LINK$.
  The table of the nodes of this network is named: ITALIA_NET_NODE$.
  
  The table ITALIA_NET_LINK$ contains a field named COST that contains links (in meters) lengths.
  
  I've already calculated the SHORTEST PATH between two nodes of the network, by using the method of shortestPath() (using the Java API) as shown on "Pro Oracle Spatial for Oracle Database 11 g" manual. Infact, this method makes reference to the COST field for $ ITALIA_NET_LINK to make this calculation.
  
  Now, I want to calculate the FASTER PATH between two nodes of the network. I have the links (in hours) travel time to make this calculation.
  
  My idea is to create a new field in ITALIA_NET_LINK$ named Cost2 containing the travel time from the links and then do the math by using the shorthestPath() method, referring to the Cost2 field to $ ITALIA_NET_LINK COST field instead.
  By default, I know that the shorthestPath() method returns the COST field for $ ITALIA_NET_LINK. Is possible to change this setting and do that this method refers to the Cost2 field?
  
  In the alternative, is another way for the calculation of the fastest way?
  I want to leave the creation of another network as last solution, because I will have other costs of field (Cost3, cos4t,...)
  
  Thank you much in advance.

  Your approach is good. You will have two networks and you can read them in memory and analyze of shortest path. The shortestPath method is static for the class of NetworkManager. You can use the same method for both networks, once they are read into memory.

  ...
  read the network with time as cost of link
  NetTime network = NetworkManager.readNetwork (dbConnection, 'ITALIA_NET_TIME');
  read the network length as cost of link
  Network netLength = NetworkManager.readNetwork (dbConnection, 'ITALIA_NET_LENGTH');

  calculate the quickest way
  PathTime path = NetworkManager.shortestPath (netTime, startNodeID, endNodeID);
  calculate the shortest path
  PathLength path = NetworkManager.shortestPath (netLength, startNodeID, endNodeID);
  ...

  In the future, if you upgrade to 11g, network data model provides a load on demand (LOD) API that loads only the scores of necessary network in memory during the analysis. This command removes the restriction of the memory of the 10g (in memory API you use) API. API of LOD can handle very large networks and offers more features analysis and modeling capabilities.

  The following link contains the tutorial of NDM LOD API ready for download. Just for your information.
  https://spatial.SampleCode.Oracle.com/servlets/ProjectProcess?PageID=0Zl7oV

  Kind regards
  Jack

• Use the stored procedure to create the data model for the bi publisher report

  Hi all
  
  Can we use stored procedure to create the data model for BI Publisher reports? I did find an example by using the stored procedure to complete the data model in the bi publisher report.
  
  Thank you
  
  Virat

  Check out these links

  BI publisher to use the stored procedure
  Re: Stored procedures and dynamic columns
  Re: Is it possible to use stored procedures in BI Publisher GUI?
  Re: PL/SQL stored w / model XML?

  If brand pls help

• "Deploy the data model for LCD screens" period

  Hello

  My Jboss is time-consuming while deploying the data model for LCD screens and it's initially Flash Builder 4 to display the error "Read Timed" out. How can I increase this timeout value?

  Thank you

  Houda

  Hello

  Please follow the steps below and see if it helps:

  1. in your Flash Builder click on the item in window menu, click on Preferences

  2. in the Preferences window, select Adobe-> RDS configuration

  3. Select your configured server and change/set Timeout

  I hope this helps.

• License / subscription model for very small team

  Hi all

  I tried to find the answer on my own, but information on the Adobe website is quite confusing to me. I need a license for Adobe Acrobat Pro DC. The program will be mainly used by my client. But I need administrative rights to all (subscription planning, installation, configuration, maintenance). What is the subscription/licensing solution more appropriate for this (small team distributed organizational)?

  • Simple single user account?
  • The team account - me or my client?
  • Product purchased directly from my client or purchased by myself (a kind of reseller model)?

  Were is not the best place for this discussion, but I guess there are a lot of users are already familiar with models of Licensing/subscription to Adobe as well as the possibilities resulting and limits.

  Thanks in advance!

  Read the user final license agreement and which could help to address the issues.  The holder of the account for a single license is the only one authorized to use the software.  Who will use the software should be the owner of the license.

• Data Modeler: changing attribute Table grayed out (in the relational model)

  I use SQL Developer Data model version 2.0.0 build 584.
  
  I have a relational model of appr. 30 paintings. For some tables, the display of attributes is grayed out, not allowing not of any change of the values. I have a feeling that this was due to an import/merge views of database, but for me this quite annoying because it prevents modelling activities further on these tables.
  
  Does anyone have an idea what could be the reason for this? More importantly: how to remedy this situation?
  
  Mark

  Hi Mark,

  Does anyone have an idea what could be the reason for this

  the reason is probably the difference in design name and name in the next item in the XML of the table:
  
  It is interesting how you did this.

  More importantly: how to remedy this situation?

  You can try ' Save as ' to save the design in a different directory.

  Philippe

• [SOLVED] Export Oracle SQL Data Modeler is missing a PRIMARY KEY on the DDL script

  I use data 4.1.888 maker to create an ER diagram and generate a DDL her script.

  The diagram contains more than 40 paintings, most of them have a primary key defined.

  For some reason any there is a table that has a primary key defined, but which is ignored when I export the model to a DDL script.

  It is the "wrong" key (even if it is checked that it is not found on the generated DDL script):

  

  This is where the key is set:

  

  And it is the preview of the DDL (Yes, primary key up there shows):

  

  This is what happens if I try to generate the DDL for just this (still not generated primary key) table:

  

  Has anyone had the same problem? Any ideas on how to solve it?

  There is no error in the log file, but when I run the generated DDL script there, and then I realized that I was doing something wrong:

  The table MEMBERS had a mandatory foreign key from another table, which in turn had a mandatory key against MEMBERS himself.

  So even if I could generate this primary key on members myself, and then run the the constraint definition that returned an error on the DDL script, I could not perform an insert operation on any of these two tables because of the constraint.

  I revised my design and realized relationships was not mandatory. I unchecked the mandatory box on the definition of the constraint and everything went well.

  I could reproduce the problem and the solution on a diagram with only two tables, so I'm sure that's it.

  Anyway, the Data Modeler is "a failed" silently in this kind of situation. It should be fairly obvious to an experienced designer that I was doing something wrong, but it is not so obvious when you deal with dozens of tables and all their relations and this is your first time using the Modeler.

  Thanks for your reply :-)

• Can't add placeholder text data merge for all blocks of text on the document

  I'm trying to put together a script that loops if all pages in an indesign file, search all text frames label caption1, caption2, caption3... (whenever you get to a new page, the number of text images label starts again from 1) and add a placeholder in the text data fusion: caption1, caption2, caption3... but this time, when you get to a new page the number continues to go... caption4, caption5 and so on.

  Page 1 - image text = caption1 = tag > data merge placeholder = < < caption1 > >

  Page 1 - image text = caption2 = tag > data merge placeholder = < < caption2 > >

  Page 1 - image text = caption3 = tag > data merge placeholder = < < caption3 > >

  page 2 - text = caption1 = image tag > data merge placeholder = < < caption4 > >

  page 2 - image text = caption2 = tag > data merge placeholder = < < caption5 > >

  Currently, the script is adding placeholder text merge data only for the two text frames first (out of 6) on a page (about 8 pages) and just the first image of text on the page two (out of 3)

  Any help will be greatly appreciated

  Here's the script:

  myDocument var = app.activeDocument;

  -SOURCE DATA CALLS FUSION

  main();

  main() {} function

  myDataSource var = File.openDialog ("Please select a datamerge source", "text files: * .txt");

  If (myDataSource! = null) {}

  myDocument.dataMergeProperties.selectDataSource (myDataSource);

  myDocument.dataMergeProperties.dataMergePreferences.recordsPerPage = RecordsPerPage.MULTIPLE_RECORD;

  }

  }

  -MERGE OF DATA FIELD

  function get_field (captionString, myDocument) {}

  fields var = myDocument.dataMergeProperties.dataMergeFields;

  for (var f = 0, l = fields.length; e < l; f ++) {}

  If (fields [f] .fieldName == captionString) {}

  Returns the fields [f];

  }

  }

  Alert ("error: did not find all the fields with the name" + field_name);

  }

  THE TEXT - ADD PLACEHOLDER DATA MERGE

  var countFrames = 1;

  for (i = 0; i < myDocument.pages.length; i ++) {/ / TOTAL NUMBER OF PAGES in the DOCUMENT}

  var capPerPage = 1;

  for (x = 0; x < myDocument.pages [i].textFrames.length; x ++) {//COUNT TEXT TOTAL IMAGES PER PAGE

  If (myDocument.pages [i] .textFrames [x] .label < 0) {}

  Alert ('can not find any image caption');

  } ElseIf (.textFrames [x] myDocument.pages [i] .label == 'caption' + capPerPage) {//IF IT IS A TEXT LABEL of IMAGE 'caption1' EXECUTE

  var captionString = "caption" + countFrames;

  var myTextFrame = myDocument.pages [i] .textFrames [x];

  var myDataMergeProperties = myDocument.dataMergeProperties;

  var myTextFrame.parentStory = monarticle;

  var myStoryOffset = myTextFrame.parentStory.insertionPoints [-1];

  var myNamePlaceHolder = myDocument.dataMergeTextPlaceholders.add (monarticle, myStoryOffset, get_field (captionString, myDocument)); ADD DATA FUSION TEXT HOLDER TO THE TEXT BLOCK

  countFrames ++; INCREASE THE NUMBER TO ADD DATA FUSION TEXT PLACEHOLDER FOR THE NEXT BLOCK OF TEXT

  capPerPage ++;

  }

  }

  }

  Hello

  To verify this change (replace for...) loop)

  var countFrames= 0, currLabel, capPerPage;
  
  for (i=0; i
  Notice countFrames starts at 0.
  Jarek
  		   

• Understand the iterator binding relationship of the current page

  Dear all
  
  in my quest to understand the behavior of the ADF framework, I sometimes do some experimentation. When a result is unlike what I think, it suggests that there is something wrong with the understanding
  
  I belong to those who can not work if I do not receive an overview comprehesive of what I am working with (ADF)
  
  Here's a simple experiment that I could use some help to understand
  
  I created a simple application based on ADF BC and JSF (10.1.2)
  
  The model is simple EO based on the EMP table and updatable VO based on the entity
  
  I slipped and fell to the control of data collection in a page as a Table with record selector
  
  I created a button with the following code
  
  Public Sub commandButton_action(ActionEvent a)
  {
  Am is AppModule_rs (AppModule_rs) ADFFacesHelper.getAppplicationModule ("AppModule_rsDataControl");. / / This just a helper class to get AM name DC
  ViewObject vo1 = am.findViewObject("EmpView1");
  VO1. Next();
  VO1. Next();
  System.out.println (VO1. GetCurrentRow(). GetAttribute ("empno")); -Read the valur of the iterator of VO
  DCIteratorBinding bd = ADFFacesHelper.getIteratorBinding ("EmpView1Iterator");
  System.out.println (BD. GetCurrentRow(). GetAttribute ("empno")); -Read the value of the iterator binding
  }
  
  Just simple code for in-house advance lines of two pointer line and then see how this is reflected in the page. This test is just for me to understand how the iterator binding refers to the actual set of rows.
  
  Scenario (1)
  
  -Run the page, the first line on the page is selected - planned, VO rowselector points on the first line
  -Click on the commandbutton control, the code above is executed
  -the rowselector forward twice and should point to the third row on VO
  -on the page of the third row must be selected
  RESULT: Match perfect and both command Print print the same value
  -Press and hold the control button, line guard page selector advances two lines at a time... which is good
  
  Scenario (2)
  
  -Run the page, the first line on the page is selected - planned, VO rowselector points on the first line
  -use the mouse and select the fourth row on the screen (not pressed) - VO is always level 1, screen on set, iterator binding binds to the rowset VO is always the first row referenes
  -Press the button
  -the page maintains its fourth selected line, while the System.out.println (vo1.getCurrentRow ().getAttribute("Empno")); prints the 7521 value which is the third - row
  -I don't feel happy, the current iterator of VO is on the third row, visually, it's fourth, which means that the selection of the user on the Web page did not consider. And this goes against my intiution
  
  
  -Press again, I find that line of page selector is the sixth line (4 + 2), therefore the iterator to all VO lines (synchornized times)
  
  Scenario (3)
  
  Run the page, the first line on the page is selected - planned, VO rowselector points on the first line
  -use the mouse and select the fourth row on the screen (not pressed) - VO is always level 1, screen on set, iterator binding binds to the rowset VO is always the first row referenes
  -Press the button SUBMIT - 4th place is always selected as expected
  -Now press the order button, you will see that line on the screen selector forward two rows and print indicates that the VO has also progressed to the same value
  -Se TRANSLATE only after pressing send, the frame cought his breath and synchronized things
  
  Coming background FORMS, things of this nature never would have happened with Disk Manager.
  
  I tried to project what has happened to the lifecycle ADF to try to understand how the interaction of the user affects the selection of lines, but was unable to reach a unified solution. What follows as an attempt for scenario (2)
  
  The user moves the selection to the fourth line
  The command button is pressed.
  Life cycle JSF begins with the RESTORATION of the VIEW.
  Apply request values (I guess the lines selection made by the user to become an integral part of request values?)
  Prepare the model (this is a post (postback), property of refreshment has ifNeeded, Binidng is created again and VO is always first in the poinitng)
  Validation process (no validation as no data entry)
  Model update (don't know if at this point the update of the line VO iterator? if so it should point to the fourth line)-doesn't seem to be the case
  Invoke the application, the listener of the action is executed and the VO is forced to move twice under the command button code
  Prepare the Render: it is a step where the link needs to be updated and reflect the currernt VO (rank 6) line
  Render: The page where the sixth line is selected
  
  where I am wrong! appreciate your comments
  
  It's what makes the difficult framework, if it is not clearly documented so the flow is very well understood by developers in one day, the developer must spend days and days debugging problems. This sure beats the idea of using frames to increase productivity
  
  I have

  Quick question - is the button that you add code to the same area (the "select and" area) as the button submit table?
  I'm guessing that it isn't and that the explanation is that just by clicking on a specific record in the table is not actually indicate to the controller layer is a selected line.
  The Send button did this update.
  One solution might be to set the autosubmit to the selected component to be true.

• StartDrag: understand the parameters (create boundaries)

  Hello

  I have a problem with the settings 'StartDrag', I want to create some kind of limits, but I can't.

  Here's what I want to do:

  the main idea is made a simple slider puzzle like this:

  [1] [2] [3]

  [6] [5] [4]

  [7] [8] [..]

  So what I need now, is that only [4] and [8] can be draggable, but also they can only go to the empty spot and then if, for example, that we get with this

  [1] [2] [3]

  [6] [5] [..]

  [7] [8] [4]

  only [5] and [3] can be draggable.

  so if anyone can help on the "bunch" I'll be very grateful, or maybe I can use something else.

  Thank you

  Left, up, right, down parameters indicate the range of values allowed for the movement of the object relative to the parent guide.

  So if the order includes 0,0,5,0 which forces the object to move between _x = 0 and _x = 5 horizontally and FLF = 0 with no permitted vertical movement - everything in what concerns mixing coordinate system object resides.  So if your object is not sitting to _x = 0 5 and the FLF = 0, then it will be moved here when you launch the startDrag.

  For what do you want to have the starting points be where the object is currently, as in... (false, this ._x, this ._y, this ._x + 5, this ._y)

  You will notice that I used fake in there instead of true.  The lock tries to force the object to lock his record with the mouse.  Something where you prevent eligible movement, you don't want to try to force itself to align with the cursor at the same time... the user is not likely to be clicking on this specific point.  Making false will make for smoother control because she struggles not to align with the cursor.

• VLAN real PowerConnect base for beginner who does not understand the trunks etc.

  I have several switches Dell powerconnect 3548 and 5548 deployed on my network to install multi that I'm managing their individual DNS names.  now, I've added a voip phone system that works on my network, but to a range of ip addresses completely different to another server.  So, I want all my switches divided into 2 VLANS.  The basic vlan 1 will always manage the switches and all ports and the vlan voip will have its own set of ports on the second VLAN.

  There is no visibility between the VLAN, just different IP addresses different server DHCPd, s so if your clogged in the vlan 1 are you a PC/printer/etc with your own default gateways defined by the field.  If you are connected to one vlan 10 you are a phone and you will get your information from an edgemark server somewhere else.

  so step by step (if you want to give me even better orders) I have actually need it to configure to create a vlan separate and independent who will seek dhcp by an existing voip to its home network device to, while I can still manage my management ip switches.  I understand not all the vocabulary of trunking and I don't know if it needs anything else including marking, because are is all autonomous.  I guess I need a guid for Dummies at vlanning powerconnects.

  VLAN datbase
  VLAN 10
  end

  Interface vlan 10
  name voip
  end

  e1 serial interface, e14
  switchport mode private vlan community?

  Here is an example:

  Console (config) # data vlan

  VLAN console(config-VLAN) # 10

  Output console(config-VLAN) #.

  Console (config) # id vlan 10 voice

  Console (config) # voice vlan Yes add XX

  Console (config) # int 1/0/1 gi

  Console switchport mode trunk #.

  Switchport trunk console # permit vlan remove 10

  Activate console # vlan VoIP

  Console # end

  Here is a white paper for configuration Dell PowerConnect 55xx series switch voice VLAN:

  en.Community.Dell.com/.../Configuring-Dell-PowerConnect-55xx-Series-Switch-Voice-VLAN.aspx

  Page 557 of the CLI Guide begins the discussion for orders of VLAN on the switch 5500 voice.

  http://downloads.Dell.com/pages/manuals/PowerConnect-5548.html

• update of security for IE8 windowsXP KB2691905 settled, said the part of installation is missing

  KB2691905 security update will not, settle said part of installation is missing. Using IE8, windows XP Service Pack 3. Keep getting update Update icon is ready to install

  Hello

  You are welcome.

  Install the update manually by clicking the below link.

  You are prompted to upgrade Microsoft Security Essentials in version 4:

  http://support.Microsoft.com/kb/2691905
   
   
  I hope this helps.

• How to recover data from plsql table in the BI publisher data model

  Hi all
  
  I created a data model for XML editor report. In the data model I m get plsql table data. for this I created a package with a function in the pipeline. I am able to run sql in sql developer. But if I run the program at the same time, then I got error like "java.sql.SQLSyntaxErrorException: ORA-00904:"XXXXX": invalid identifier.
  
  I used the same settings in the data model and simultaneous program...
  
  Please tell me what to do...
  
  Thanks in advance...
  
  Kind regards
  Doss

  I think P_ORG_ID is the parameter
  so use

  :P_ORG_ID
  

  -Add
  also why not use simple sql query?

  Published by: Alexandr Sep 14, 2012 04:48

• Oracle SQL Developer Data Modeler start error

  Hi all
  
  I just downloaded Oracle SQL Developer Data Modeling (2.0.0.57.0) [released July 1, 2009] by selecting the option ' Oracle SQL Developer Data Modeler for Windows (this zip file contains the JRE).
  
  After that I installed the same and tried to start clicking on datamodeler.exe, I get the following error message
  
  "Failed to create an instance of the JVM on the path:... \jdk\jre\bin\client\jvm.dll.
  
  On the same machine, I can successfully run the SQL Oracle program without error. My machine is having Windows XP Professional SP3.
  
  Any ideas? If there is a problem with Java, that of the Oracle SQL Developer should also not run. But as I said it runs with any error, but the Oracle SQL Developer Data Modeler gives the above error.
  
  Kind regards
  
  JAA149

  Hey Jawad,

  you wrote you have 960 MB of RAM - how did you do a test with 1.5 MB of RAM and 2 MB of RAM?
  No doubt this is a problem of memory - memory change in the datamodeler.conf file option:
  -There 'AddVMOption-Xmx768M"by default; to take
  -"AddVMOption-Xmx512M" or never, making it suitable for your configuration - you can check the available free memory first.

  Philippe

• How to consume the data model library adf for the project?

  Hello
  
  I use Jdev 11.1.1.6.
  
  I have a workspace Jdev containing the business component (entity objects, view and application module objects exposing the your). This workspace is deployed to a library of the ADF. This library is packed with DB connection details.
  
  I have a different workspace Jdev which needs to consume this library of ADF data model. This workspace is actually just the layer view (no business at all components).
  I added the data library ADF model to his draft opinion and it is showing application module and your sub of the data controls.
  
  My question is: how will this project view to connect to DB when running?
  It allows the connection of packaged data model ADF Libabry? If so, how?
  or should I create a business under this workspace view, just the purpose of connection project? If Yes, then what is the use of connections, including creating the library of the ADF?
  
  Thank you
  JAI

  Hello

  It uses the connection in the library of the ADF. However, I recommend that not save you the database connect information in the library of the ADF. Instead:

  -set the ADF BC model to use JDBC data sources
  -In the library of the ADF, configure it to contain only the name of data source
  -In the view project (the workspace) set up the database connection that is exposed by the library

  When the library is imported, verify the Application resources--> connections and right click on the name of the connection that is imported to configure

  Frank