Entity Relationship Diagram
20
votes
10answers
541 views
What is an effective way of labeling columns in a database?
I used to label columns in my databases like this:
user_id
user_name
user_password_hash
To avoid conflicts when joining two tables, but then I learnt some more on how to alias tables, and I stopped ...
5
votes
2answers
180 views
Design: How do you decide when items are related vs when they are attributes?
I've been trying to figure this out for a while. Let's say you have a person, for example. An attribute of a person is his or her social security number, right? But a person also has a social ...
3
votes
1answer
5k views
How can I import the contents of an Oracle database into Visio to create an Entity Relationship Diagram?
I have an Oracle database, and I would like to create an ERD in Visio 2007 Pro.
I have so far looked at DBMS_METADATA.GET_DDL commands to generate ddl. I know that I can import an Access DB into ...
5
votes
3answers
439 views
how do I model this in database?
I am using mysql as my backend database. Here is the use case;
A HolidayPackage is configured with some default offerings. These default offerings can be up/downgraded based on the options provided. ...
