ThatJeffSmith

Tag: data modeling

More Fun with Data Modeler Diagrams

Everyone likes pictures. Generate a report without any pictures, graphs, or charts and see how many ‘likes’ you get at work. Everyone gets excited about data modeling, and in some circles, folks think that data models are synonymous with diagrams. But really, the diagram is just the ‘pretty picture’ you add to your office report. […]

SQL Developer Data Modeler Screenshots

I’ve taken a TON of screenshots of both SQL Developer products to demonstrate features. I was playing around with Flickr to see if there was a better way to re-purpose this content other places. Here’s what that COULD look like. I have a few hundred more to add to this photo album. This is just […]

Are Invisible Columns Really Invisible?

Today’s question: How are invisible columns treated with DESC, INFO and the GUI equivalent? Super quick, an INVISIBLE column is one that the user doesn’t see. They won’t be able to access it unless they know about it. Security by obscurity? No. Tom Kyte shows a few examples of the features usefulness, especially when adding […]

‘Modeling’ View Dependencies in SQL Developer Data Modeler

Today’s question: Please let me know how can I represent relation between view and base table in ER diagram created using sql datamodeler version4. So I know what the person is getting at here. They want to see the dependencies. Generally speaking, there are no actual relations between views and tables. Exception: you CAN define […]

Modeling Function Based Indexes in Oracle

@thatjeffsmith Is there a way to define a function-based index in #SQLDevModeler? — Kent Graziano (@KentGraziano) October 29, 2014 Function based indexes [DOCS] have been part of Oracle Database since at least version 8. Instead of just indexing someone’s name, you could also index the values returned by a function call over that name. Example […]

Data Modeling via Excel?

In SQL Developer if you use the Import Data feature from the main tree node, it will create a new table based on a delimited text or Excel file. We’ll look at the data and create some columns for you. In version 4.1, we’ll recognize numbers as numbers, dates as dates, and try to get […]

Viewing Complex Types in Oracle SQL Developer Data Modeler

Instead of having a column of type VARCHAR2 for a ‘Country,’ you might want to create an COUNTRIES type. Said COUNTRY would have an ID, NAME, and LOCATION. To make things even more fun, LOCATION would also be a custom type of LOCATIONS, having even more attributes/columns. To model these from scratch, you would build […]

Related Posts Plugin for WordPress, Blogger...