Oracle Database SQL Language Reference, 11g Release 2 () . Oracle Database 11g Release 2 () New Features in the SQL. Product 6 - 33 Oracle University and BUSINESS SUPPORT LTDA use only. THESE eKIT 1 Retrieving Data Using the SQL SELECT Statement. Objectives generated in multiple formats such as PDF, HTML, Excel,. RTF, and so on. Oracle Notes PDF - Free download as PDF File .pdf), Text File .txt) or read online for EAXMPLES OF ORACLE ARE: MS-ACCESS, SQL SERVER ETC.
|Language:||English, Spanish, French|
|Country:||United Arab Emirates|
|Genre:||Health & Fitness|
|Distribution:||Free* [*Registration needed]|
Oracle SQL & PL/SQL Optimization for. Developers .. personal field notes too, so they evolve as we discover new avenues of investigation. Oracle Database. Notes for Professionals. Oracle®. Database. Notes for Professionals. mitliotrachighgold.gq .. Section Changing How SQL/Plus or SQL Developer Display Dates. 18 Please feel free to share this PDF with anyone for free. Section Oracle CONNECT BY functionality with recursive CTEs .. Please feel free to share this PDF with anyone for free, This SQL Notes for Professionals book is compiled from Stack Overflow.
You can also click Test button to check if your configuration is correct. Import objects Now when you created the connection to your database, you can start schema import.
First, select the connection you just created and press the Next button. In next window, you will see a list of available schemas on the server. You can also choose to which model you want to import objects.
Since you chose the schema from which you want to import objects, now you need to mark the ones you actually want to import. Objects are grouped by their type. Each type has its own tab visible on the bottom of the window. After you press the Next button, you will see a summary on how many objects were imported by their type. As you can see below, I have imported seven tables and one view. To end process of importing objects press the Finish button.
After that, you will see import log, press Close to finish the import. Customize ER diagram For now, you connected to the database and imported objects from it. After import, objects are added to your Relational Model, and the database ER diagram will be automatically created. If you would like to modify the appearance of the model just move objects on the pane.
Handling this case is a material for the next tutorial.
Create smaller diagrams for large databases Data Modeler has an option called SubViews. SubViews, as the name suggests, is part of the whole model.
If you imported a lot of tables and views, you might want to break your diagram into smaller, more manageable diagrams. This is where SubViews come into play. I have added two tables to my SubView. Objects which you moved to SubView are the same instance as an object in the Relational Model so you can edit comments in both Relational Model and any SubView.
Comments in RDBMS - holds information imported from the database if you update this field you will be able to export descriptions back to your database - this is a material for another tutorial. This field has not limited length but if you exceed characters and will try to save descriptions back to the database the script will throw an error. Comments - holds descriptions which are saved only in the design file you are working with at this very moment. DATE: Another self-explanatory data type.
A primary key is a key — a column or combination of columns — that uniquely identifies a row. Let me explain. When eventually, you rise to leave, you exchange names and numbers and promise to stay in touch.
They say their name is Ross Geller. You add it to your address book. But you already had a friend named Ross Geller! How will you know which is which when you want to phone them up and laugh about the monkey joke again?
Databases rule the world, and thus, primary keys are all around us. Relational Databases We now have all the pieces of the puzzle. We can now redefine — and understand — relational databases.
A Relational Database is a database in which the data is organised in tables with the relationships being maintained between the different tables. Our database has a table for names, another for phone numbers, and a third for addresses.
However, there is no way of knowing which of our friends lives at what address and when, or what their phone number might be. Data Modeler has an option called SubViews. SubViews, as the name suggests, is part of the whole model. If you imported a lot of tables and views, you might want to break your diagram into smaller, more manageable diagrams.
This is where SubViews come into play.
I have added two tables to my SubView. Objects which you moved to SubView are the same instance as an object in the Relational Model so you can edit comments in both Relational Model and any SubView. Export includes only one description field - by default, it is Comments field. When using Comments in RDBMS keep in mind that you should not insert text longer than characters as it will cause an error.
Unfortunately the tool doesn't cant handle it properly nor tells you that you exceeded this length.
Once you have added a description for a table, it is time to describe columns. To see a list of columns select Columns on the left menu.
You choose columns in the middle pane on the Details tab and provide descriptions of the text fields on the right pane. Comment as many elements as you need. When you finish with the table close it with OK button. Note that your changes in your model file are not saved yet. After you modify table descriptions, they will be highlighted in a browser window in red.
Save the file to keep your changes, if you close Oracle SQL Developer Data Modeler without saving it, you will lose all the changes made. I will describe how to do it in another article.
Try all types of exports to see which one suit you best. If you want to export all objects imported from the database and diagrams just skip this section. Besides standard configuration, you can create templates of export, where you can choose elements of objects which you want to show in your documentation. To create or edit templates click Manage button.
Under Report Configuration in Objects tab, you need to choose which SubViews and which objects you want to export.
You can add and edit report configurations after you click Manage button. By default for new configuration option Include All Objects is chosen. If you would like to generate documentation for specific SubViews, click on Choose Subview s Objects and move SubViews which you want to show in documentation to right Selected box.
When you are ready, click Generate Report.