Creating an ERD

Hello
Could anyone tell me how to create an ERD of a database using SQL Developer?
Thanks

Hello,
there is a viewlet for that at data modeling page http://www.oracle.com/technology/products/database/sql_developer/files/Modeling.html .
It's good to read "release notes" if you are going to connect to supported none Oracle database.
Best regards,
Philip

Similar Messages

How to create an ERD from existing database ?

hi all
how i can capture from databse and create an ERD from the whole of database by designer ?
ssaeeds

Does a very lousy job at it, as it can create only 1 ERD, one screen big and doesn't save intermediate results.
Sybrand Bakker
Senior Oracle DBA

Trying to create an ERD in JDeveloper...

I am trying to find an tutorial that will help me create my first erd using jdeveloper. So far I have been very unlucky... I am getting frustrated... I have connected to my oracle db, but not understanding where I go from here...
I am very new to oracle and jdeveloper. But understand DB design and SQL.
Someone please help me..
Thanks

Please follow these steps,
1) Right click on your project (if you do not have a project create one) select "New" option
2) Choose "Database Diagram" and click "OK" button.
3) Fill out the values for and select "OK" (name, package)
4) You should now see a new tab in the source editor. If not navigate to the package that you specified under "Application Sources" of your project in "Application Navigator" and double click the node with the same you specified in step 3.
5) Now select the tables from you database connection and drag it to the database diagram editor tab. Note: If you want the relationships between tables, then ensure that you select and drag all the tables under consideration into the editor. If not, I think you have to manually define the relationship(s) from the component palette.
Hope this helps.
Thank you,
Bala Raman.

Create physical erd from logical erd

I have created the logical ER diagram using designer 6.0.
I would like to know the steps involved in creating the physical ERD (diagram).
I have already done the database transformation sucessfully. I opened the design editor where i can see the relational model with all entities listed. But
i do not see the physical ER model. I was expecting the
Physical ER model in the server model diagram. If i try to open the server model it gives me an option to create a new physical ER diagram. Am i looking in the wrong place ?

In the Design Editor:
Drag the Table names (under Relational Table Definitions) to the empty spot (dark grey) of the GUI on the right side. It will create a new diagram and put the table(s) and any related FK constraint lines on the new diagram.
HTH.
Thanks, George

How create a container for diagram ERD (Oracle Design)

Hi,
I need help it will create an ERD but pops up a screen asking me to choose "Select the deafult container for this diagram."
And the choice is all in white registering wanted one but do not know where to register.
Can anyone help me ..
It is urgent "" "" "" "" "" "" "" Help
thank

Are you still waiting on this, Marley?
To create a container, open the Repository Object Navigator (commonly called the RON). A container is simply a name under which you are going to group your model-information within the Workarea. The RON typically opens with the Workarea Name selected, so on the Edit drop-down menu select "Create Child..." and then select "Folder" and click OK. You're going to create a folder under the Workarea, so Designer opens a box for you to type-in a NAME for this new folder. Give it a meaningful name for your model and press ENTER. Designer will now create your folder (also referred to as a CONTAINER).
You should now be able to close the RON and, when you create a new ERD, the pop up should give you the name of the container to select.
Did that work for you?
Rod

Using a dump how can i create a ER diagram

Can any one tell me how can i draw a ER diagram automaticaly by using an existing Database.i mean i have a database with all the relationship,triggers and views now i want to make a ER diagram automaticaly by using this database ... is there any tool for this or is oracle provides any tool can any one help me out to solve this problem
thx in advance....

As you are asking on the Designer forum,I am assuming you have a Designer Repository set up. If this is the case,you can use Designer to capture the design of your schema and create a schema model. You can create an ERD from this schema model by using Designer's table to entity retrofit utility. Check out the Designer demos on this site for more. (http://www.oracle.com/technology/products/designer/demos.htm)
If you do not have a Designer Repository setup, why not try JDeveloper? You can download the latest JDeveloper 10g Preview release from OTN and, using the connection node, connect to the required schema and pull the tables from your schema onto a Database diagram. JDeveloper allows you to quickly and easily review your schema model visually.
You can also create UML Class models based on your schema.
There are numerous demos on the JDeveloper area for the UML modeling JDeveloper offers. (http://www.oracle.com/technology/products/jdev/index.html)
Regards
Sue Harper

Open ERD file

Hello,
Is there a way to open an Entity-Relationship Diagram with SQL Developer or SQL Developer Data Modeler ?
I've create this ERD file with Toad.
Regards

If you have your model in TOAD and can produce the DDL from that, you can import the DDL into SQL Dev Data Modeler. The Modeler allows you to reverse engineer to that to the logical ERD. Alternatively you can connect the Modeler directly to your database and import from that. Again, if you want to get up to the logical ERD you can reverse engineer that.
Sue

How to handle many tables in ERD

Hi:
I have a schema with about 400 tables in it. They tend to be grouped into 5-10 groups of related tables. In a perfect world, I'd be able to arrange them in an ERD diagram and zoom into the appropriate area when I want to work on that section but I wouldn't have to recreate the arrangement of the tables in the diagram. I'm not aware that OWB can do this. I don't even think it can save the diagram as anything but SVG, which means every time I want to work an ERD I have to recreate it? I have to select all the tables, maximize them, arrange them each time?
How do people normally handle hundreds of tables in OWB? Do you break the large schema up into numerous smaller source schemas and only end up with the large schema after deployment?
Thanks

I meant both, actually. I'm trying to create an ERD or set of ERDs to help me figure out what I need to do in a large (to me!) ETL project. I'm using OWB to create a new target schema based on a source schema. I'll be converting VARCHAR2(2000) and LONGs to CLOBS and consolidating tables and doing other stuff. An ERD would help me visualize the current schema and work on isolated pieces of it. Does that make sense?

How to print ERD from Data Modeler Tool

Hello Everyone,
I have an oracle 10g DB and I want to create its ERD. I was able to export the tables using Data Modeler tools but I cannot find the option to arrange these table on pages and then print them. How can I do that? It's a very basic requirement and I am sure it must be here somewhere but I can't seem to find it.
Regards,
Afraz Ali

Hi Afraz,
there is no support for arranging tables on pages. For printing - use "File>Print" or "File>Print Diagram".
Philip

Nothing happens on create function

I'm quite new to Oracle. After I've installed the database,repository and the designer, I tried to create an ERD via the Entity Diagrammer. I managed to create an entity diagram, but on adding new entities, through the 'Create Entity' nothing happens. I press ok and the created entity screen remains there. Pressing cancel removes the screen but also removes the entity.
Does anyone know what I'm ding wrong?
Thanks

1. you have to have an applicaion created.
In the Repository Object Navigator - Right click Global Shared Workarea - Crete Child - Select Application Systems - Enter a name and then save
2. from the front panel select the Entity Relationship Diagrammer (ERD)
3. Select New Diagram
to the right of the drop down is a table page select your application( it will be in the drop down from now on) - OK
The gray area now had a new working area named ERD1
4. You should have a new tool bar at the top with an arrow and the oblong that says Entity when you run your mouse over it.
5. Click the Entity icon once and go down and click your workingarea. You should have a Create Enity box and a selected dashed box of where the entity is going to be.
Enter the Name and OK.
The Dashed box is now a solid line box with the name you selected in it.
Double click the box and now you can populate attributes and all the other options you will need.

Can't create an entity

Perhaps someone has seen this before, and can tell me the little thing I must have missed in wading through the designer install.
I've created a user (me) and am able to create an ERD, when I begin to create entities, I get the Create Entity dialog box. When I complete the name, short name, and plural fields and click on OK, nothing happens. The entity is not created, the dialog box remains. Clicking cancel or closing the dialog box just deletes the entity box in the ERD.
Ok, what did I miss or am missing?

Please check the type of container you are using for your ERD. Only containers defined as 'Application Systems' can be used to store ERD diagrams. Containers defined as 'Folders' cannot store structured information like ERD
diagrams.
As this is probably not what you are trying to do, please check all you packages are valid, using the RAU and that your user is able to create these elements.
Regards
Sue

ERD Tool for Linux

Is there a reason why Oracle has refused to create an ERD tool that works on Linux?
Has anyone found a good Linux-based ERD tool?

I've heard some good things about aqua studio, which should also work under Linux.
C.

Generating an ERD

Greetings,
I would like to create an ERD from the metadata in OWB. I'm thinking it reasonable for either Designer or ERwin to import this data either from the .mdl file or a bridge, but I'm only seeing a bridge for Express and Discoverer. Does anyone know how to accomplish this? Perhaps I will need to import each fact and dimension table separately?
thank you,
Kristi

u can only import from ERWIN or DESIGNER.. .to generate ERD we would have to get it through reverse engineering the metadata from the database....

Maintaining existing ERD

We have an existing system where the data model was created and the table definitions generated from the model. Since the developers have added additional columns to the tables that I would like to record in the ERD. I know that I can capture the database design, but is there a way to reverse engineer the database into a data model without overwriting the descriptions of the entities and the attributes? There has been a lot of effort in creating the ERD and we do not want to loose the information. There does not seem to be an option in the table to entity retrofit tool.
We are using release 9.0.2.6
Message was edited by:
phattam

That's a good question.
The correct answer is that of course you should maintain the ERD. In fact, that makes it sound like the ERD is an afterthought, when the correct approach should be that any new requirements may result in changes to your ERD (I'll use the term logical model to be clearer), which in turn update your actual database.
In practice, sometimes the logical model gets forgotten and the effort is concentrated on the the physical model, as you say. One of the reasons for this (and which I have experienced personally) is that in a development team only one person has Designer so it's easy for developers to bypass it.
From the traditional perspective that the logical model details 'what' info you need to hold, and the physical model details 'how' it's held, you might want to consider the impact on training people in this system (do you use ERD or SMD? Who's your audience - business people/ developers/ both?) and also any audit requirements (e.g. how did a given column come into being, what were the requirements?). If you don't keep the logical model upto date, new columns in the SMD won't have a source attribute to map to.
Antony

How to take a dmp from my designer user

dear friends
i'm new with oracle designer
i created a uers named ERP and granted all the needed privilages
then i succeded to install the reprosotry
after that i created a new application folder and i created my ERD digram successfuly
then i managed to generate the scripts that create the tables and the index and constraints
now i need to take a dmp for all of this
how??

You can easily open Repository Object Navigator and select the application. Then you should choose Utilities->Export to export your application or folder to a dump file.

Creating an ERD

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