How do i properly design a data model for Recipe / Ingredient using MongoDB?

Recently i have designed a database model or ERD using Hackalode. So the problem I'm currently facing is that base o...

Is a unary/recursive relationship strong/identifying or weak/non-identifying??

First, some definitions to make sure that the terminology I'm using is clear: Strong and weak entities and strong/i...

When does one use ternary relationships instead of binary ones in a database??

I have a problem, it is as follows: An internet store wants to send e-mails to customers. It wants to keep a databa...

Anyone have an ERD symbols quick reference??

I'm looking for a one-page quick-reference or cheatsheet (preferably in PDF) to the meanings of the various ERD symb...

Entity Relationship Diagram for Hotel?

I need to create an ERD for a hotel, the question reads as follows: "The owner of a set of hotels would like to hav...

How to generate an entity-relationship (ER) diagram using Oracle SQL Developer?

I want to use Oracle SQL Developer to generate an ER diagram for my DB tables but I am new to Oracle and this tool. ...