Tag: Entity Relationship Diagram

What Is a Weak Entity and How Do I Denote It in an ER Diagram?

Gustavo du Mortier

Gustavo du Mortier is a functional and data analyst at MasterSoft, an Argentinean software company specializing in ERP and healthcare solutions. He’s written many books and articles on different aspects of programming and databases. In his spare time, he plays guitar and helps his two sons build and enhance their gaming computers.
Although its name could suggest otherwise, a weak entity can be very useful for properly modeling a database. In this article, we’ll study examples of weak entities and learn how to use them to improve your data modeling skills. If you are about to design a data model, you probably already know what entities are and how they are represented in a diagram. If not, you can read about entities in Vertabelo’s logical model documentation.

The Difference Between Entities and Attributes in a Data Model

Radu Gheorghiu

Radu works as a full-time data engineer. He loves SQL and anything data-related. In his spare time, he likes to put his data to work by building data pipelines. He even trains machine learning models to predict the best time of the day to drink his coffee. He also enjoys helping others and sharing his knowledge on our blog and Stack Overflow.
The entity-relationship model is composed of different elements. The most important types of elements are the entities and their attributes. In this article, we go into detail about the distinction between them, the role they play in a data model, and the steps to create them in Vertabelo. What Is Data Modeling? Data modeling is carried out by a database architect or database modeler. It is the process of creating a diagram that lists the set of data structures that are going to be the data backbone of a software application.

7 Tips for a Good ER Diagram Layout

Kovid Rathee

Kovid is a Data & Infrastructure Engineer working as a Senior Consultant at Servian in Melbourne, Australia. He is originally from Rohtak, India. In a career spanning 10 years, he has worked for startups and corporates, product companies and service companies alike. He started his career as an Assistant Professor at an engineering college and later moved to a full stack developer role for a while, before finally moving into the data space where he has been working for the past 8 years. He likes to write about data engineering, infrastructure-as-code, DevOps and SRE. He is a semi-trained Indian classical singer, writes poetry in Hindi and Urdu, and hopes to get published someday.
In this article, you will learn some practical tips for organizing data models, creating readable layouts, and efficiently working with ERDs (entity-relationship diagrams). Database diagrams are to applications what blueprints are to buildings. The more components a building has, the more complicated it is to design. Unlike buildings, though, databases undergo persistent changes, which is why ER diagrams are used to understand the structure of the database and ensure that the most current models are deployed.

What Are the Symbols Used in an ER Diagram?

Katarzyna Piskała

Katarzyna has a Master’s degree in Mathematics. At Vertabelo Academy, LearnSQL.com, and LearnPython.com, she creates and improves programming courses. She also helps users of these sites to improve themselves. In her free time, she loves traveling, dancing, and teaching.
Find out what symbols are used in the Entity-Relationship Diagram (ERD) and what they mean. The most popular notation in ER diagrams is the Information Engineering (IE) notation, also called crow’s foot notation. This is the default ER diagram notation used in Vertabelo. There are a few standard symbols used in logical and physical ER diagrams, and some useful additional non-standard symbols that you can use in Vertabelo. We’ll discuss them in this article.

Explaining an ER Diagram, With Steps and Use Cases

Sudip Sengupta

Sudip is a TOGAF Certified Solutions Architect with more than 15 years spent in the IT industry. He is now a full-time freelance technical writer and has contributed to several publications on various topics including the cloud, DevOps, SaaS, and cybersecurity. When not reading or writing, he is found playing a game of chess or in a squash court.
Get to know what an ER Diagram is through use cases and examples. Explore the notations for the essential components of an ERD. Entity-relationship diagrams (ERDs) are used to visualize data and relationships among the entities of a system. At its core, an ER Diagram explains the logical structure and the flow of information within a data model. To do so, an entity-relationship diagram highlights entities, attributes, and relationships through predefined symbols for effective visualization of the architecture.

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