Below you'll find a list of all posts that have been tagged as “data modeling”
Was helping someone on Stackoverflow this morning, and thought you might enjoy seeing this process as well. PROBLEM: You’ve created a schema script, you’ve generated the DDL, and you ran it on your brand-spankin’ new database. Except. Except, you ran that script as SYS, and your schema scripts didn’t have a SCHEMA defined. So you’ve corrupted your SYS schema!!! How …
You might have heard we now have a new SQL Developer in the family: SQL Developer Web. If that’s news to you, here’s a quick video recap: Hopefully you noticed that one of the main features of SQL Developer Web (and SQL Developer Desktop!) is data modeling. We were thinking: wouldn’t it be nice if could pull up a diagram …
In this 10 minute video, you get: super quick recap of the Worksheet building a new diagram moving stuff around, changing the colors generating DDL generating a data dictionary report saving and searching diagrams This was my 50th post on YouTube. If you like what you see, be sure to subscribe there so you don’t miss any updates. Your subscriptions …
Someone asked, hey, I know how to hide the schema notation in our diagrams You can too – READ THIS POST – …but (there is always a BUT), how can we hide it from the data dictionary reports as well? The answer is – you need to manage the report template. When you open the Report dialog, switch to the …
Let’s say you have a schema you want to reverse engineer and generate some docs. Lo and behold, the developers used foreign keys! But…there are so many of them, I can’t see the forest for the trees. So how do we make this simpler? Well, our developer for the Data Modeler showed me this trick: In his words: when use …
You have a schema. Someone else built it. You’ve just inherited it. Now you need to build an application around it. But, tell me more about this schema? No docs? That’s OK, you can build your own! 1. Connect to Your Database, Open a ‘Driving’ Table By driving, I mean one that’s likely to be at the ‘center’ of your …
Customer asks: We tried also to apply some naming conventions but I think we didn’t understand something…. Having a logical model with a table having the column X, and a glossary having the standard name as Y. Can I apply some checks based on the glossary directly in the logical or relational model? Yes, in fact you can. Basically how …
Having an extra bit bucket in your tables is pretty easy now in Oracle Database 12c and higher. We offer native JSON support [JSON DOCS] – you can have a free form text column and store anything you want in it. AND, we pretty much give you the full power of the SQL interface to those bit bucket items – …
Your relational models can get big. Bigger than the human mind can easily consume. So instead of generating a report of 2,500 objects, you might want to break down your model to smaller chunks, AKA SubViews. So let’s open the reports, which you’ll find on the main File menu. First, we don’t want the main diagram in the report, that’ll …
When using the data modeler, we assume when you add a foreign key, you haven’t already created the ID column. So we create that for you. Here’s what that looks like. I draw the relationship. I don’t want that. I want it to use USER.USER_ID instead. Click on the Column, and toggle it to USER_ID. When I click ‘Apply’ or …