Tag: Database Modeling Tool

What Are the Different Types of Data Models?

A data model determines the logical structure of a database. It helps you find possible design issues before implementing and deploying the database. However, there are different types of data models which are used for different things. That’s what we’ll discuss in this article. The first step you should do when creating a new database is to model it. There are some basic principles that should be followed in this case.

8 Advantages of an Online ER Diagram Tool

ER diagram tools are a key component in software development. Whether you are designing a new system or feature from scratch or analyzing and applying changes to an existing solution, you need an ERD modeling program. Using an online ERD diagram tool allows you to start working immediately, without worrying about installation and setup. Plus, online ERD tools enable quick collaboration and easy access to your data models. You may have heard the phrase “a picture is worth a thousand words”.

Top 15 Database Modeling Tips for 2021

Here are 15 simple tips that will guarantee the quality of your database model! Prior to the emergence of NoSQL databases, data modeling had followed a standard norm. However, with the hybridization of storage models and especially with the integration among them, it has become necessary to consider NoSQL databases in systems that use relational databases. This article covers 15 tips for modeling databases in 2021 (the database modeling tool used in this article is Vertabelo).

Top 7 Useful Online Database Tools

Let’s discuss some useful tools for designing and developing your database hassle free while saving you money and time. In the modern software world, database systems play an important role. Most businesses depend on various database systems. Database architects and software engineers design and develop various types of database systems to manage the business. Online database tools have become very well known among database specialists and software engineers for their advantages.

Data Modeling Tools: Choosing the Best for Your Needs

Data Modeling Tools: Choosing the Best for Your Needs Before you can choose the right data modeling tools, you have to understand what a data model is and how to use it. This article will explain those concepts and then compare some of the various data modeling tools available. A data model is defined as an abstract model that organizes several aspects of data (e.g. data description and semantics and the consistency of data constraints).

What's the Best MySQL ER Diagram Tool?

Still spending hours of manual work on MySQL data modeling? Discover the best MySQL modeling tools that save you time and money! The ER diagram (or entity-relationship diagram) has become an extremely popular data modeling concept among data architects, database administrators, and DB developers. And MySQL is one of the most popular database management systems (DBMS), especially for web applications. Thus, many ER diagram tools that support MySQL (aka MySQL ERD tools) have arrived in the market during the last decade.

What to Look for in Your ER Diagram Tool

Do you find it challenging to choose the perfect ER diagram tool to save time and cost for your next database project? Unsure which features are the most important to include in your evaluation criteria? Read this article! The entity relationship diagram, or ER diagram, has been an industry standard used in database modeling among database architects for many years. An ER diagram is a graphical way of presenting a proposed database schema (tables, references, views, etc.

What Is an ER Diagram?

If a picture is worth a thousand words, then entity-relationship diagrams (or ER diagrams) are a priceless way to visually explain the structure and behavior of a software solution. Learn how to make your own ERDs with the Vertabelo online data modeler! The term entity-relationship diagram and its abbreviations ER diagram and ERD are frequently used when designing and implementing databases. What are these entities and relationships we’re diagramming?

Getting Started with ER Diagrams in Vertabelo

Learn how to use Vertabelo’s user-friendly data modeling platform to create your first Entity-Relationship (ER) diagram! If you’ve never used an online ER diagram tool before, you might be a bit lost about where to start. Don't worry; I’ll give you a step-by-step guide to getting started with Vertabelo and creating some basic ERDs (Entity Relationship Diagrams). Vertabelo is an online ER diagramming tool that helps design and visualize databases.

Why Do You Need an ER Diagram?

Curious about why we model data with an entity-relationship diagram (ERD)? You've come to the right place. An entity-relationship diagram, or ER diagram, is essential for modeling the data stored in a database. It is the basic design upon which a database is built. ER diagrams specify what data we will store: the entities and their attributes. They also show how entities relate to other entities. Another advantage of ERDs is that they represent the data in a graphical manner.

Top 7 Entity Relationship (ER) Diagram Online Tools

Are you searching for the best online ER diagram tool? Read on and discover our top picks. Data modeling is one of the most critical parts of a software project. Database architects use ER diagrams (also called ERDs or Entity Relationship Diagrams) as a data modeling technique. Many ER diagram tools are available, but choosing the best tool for your project can be hard. Still, your data model is a key factor in the success of your entire project; it’s important to get it right.

2020 Was Vertabelo Database Modeler’s Year. It’ll Get Even Better in 2021.

2020 is coming to an end. It's been a busy year for us, so let's summarize what we did at Vertabelo. I will also show you how the Vertabelo database modeler will evolve in 2021. This is already a great tool, but it will be even better. See what we plan to do. I am not exaggerating when I say that we had our hands full in 2020. In addition to constantly improving the Vertabelo database modeler and creating new Vertabelo Academy courses, we have launched completely new platforms for learning SQL and Python.

How to Draw an ER Diagram Online

In this article, I will be listing some of the top tools for drawing ER diagrams online. Priority will be given to ease of use, user experience, and functionality. An entity relationship diagram, or ER Diagram (ERD), is a visual model of your database schema. It describes the database structure and helps conceptualize how pieces of data interact with one another across a robust database. To some extent, ER diagrams look like flowcharts; they show the database tables as rectangles, with connecting lines representing the relationships between tables through primary and foreign keys.

Crow’s Foot Notation in Vertabelo

Various ERD notations follow different styles for entities, relationships, and attributes. Usually there isn’t much standardization between them, so notations bear little resemblance to each other. Among the plethora of ERD diagram notations, crow’s foot notation is definitely the most used. In this article, we’ll investigate its components within the Vertabelo database model. Before we start looking into crow’s foot notation, we must understand that there are various levels of Entity-Relationship diagrams: conceptual data model – an overview of what should be included in the general database model.

Part 2 – How to Organize a Large Database Diagram

In Part 1 of this series, we successfully imported the SuiteCRM database structure into our online database modeling tool. That’s when we saw that the model contains 201 tables without relationships between them. We got a wild bunch of tables that looked really messy. In this article, I will show you how you can organize such a large model. Just after importing to Vertabelo, the SuiteCRM database model looks as follows:

Tip #24 – How to name a version of the model

Vertabelo offers you a feature to assign tags to particular versions of your model. It may be used, for example, to match the versions of your database model with the versions of your application. To assign a tag to the current version of the model, click Set tag in the options menu: Enter a tag name and click Set tag. Now, this version is tagged.

Tip #23 – How to create a reference to an alternate key

Sometimes, you want the reference between two tables to reference an alternate key and not the primary key. Here's how you can do it in Vertabelo. In this example, we want to model cars and their owners using owner and car tables. The car table has an alternate key consisting of the vin column: We want the owner table to refer to the car table, but using the car table’s alternate key.

Tip #22 – How to identify problems with my model

Vertabelo has a built-in mechanism of live validation that checks your model all the time and gives you hints on how to improve it. Every error, warning or tip is flagged by a dedicated icon that you cannot fail to notice. Within your workspace, the problems are indicated in two places. In the left panel you can review all problems found in your model, while on the right side you’ve got information on problems detected in the currently selected object only.

Tip #21 – How to quickly find a table in a diagram

Do you know the quickest way to find a single table even in the largest diagram you can imagine? The answer is to double click the table’s name in the navigation tree! In the Model structure panel on the left, you’ve got a navigation tree with groups of all elements used in your diagram, including database objects such as tables, references and views, as well as other subsidiary elements like subject areas and text notes.

Tip #20 – How to configure Vertabelo printouts

Sometimes you may want to export your database model to a PDF file, especially for documentation purposes. It often happens that your diagram is larger than the default page size set in Vertabelo. If that's the case, you should configure the printout options in the Format section. Make sure that no element in your diagram is selected. Go to the Model properties panel on the right and expand the Format section which provides some basic formatting parameters.

Tip #19 – How to automatically download SQL script from Vertabelo

If you need to automatically download SQL script from Vertabelo, for example, for the purposes of your build system, you definitely should check out our Vertabelo API. It allows you to download an SQL or XML of your model by a simple HTTP request. In the command line, it may look like this: VERTABELO_API_TOKEN=put-your-api-token-here MODEL_ID=put-your-model-identifier-here curl -u $VERTABELO_API_TOKEN: \ https://my.vertabelo.com/api/sql/$MODEL_ID create-database.sql To learn more about Vertabelo API, go here.

24 Database Modeling Tips for Vertabelo

In our previous Tip #16 and Tip #17 you could have learned that using table shortcuts makes it easier to create a well-laid-out database model. Do you know that references between shortcuts may be shown in the diagram too? Let’s go back to our example from Tip #16. Assume that we have already created all necessary subject areas. Now, we want to put shortcuts of all purchase-related elements in the Purchase subject area.

Tip #17 – Drag a table from the navigation tree and drop it in your diagram to create a shortcut

In our previous Tip #16, we showed you how to create shortcut tables using copy and paste. But did you know that you can create a shortcut of a table with only one move of your mouse? Just find the table in the navigation tree and then drag and drop it in the desired place in your diagram. Let’s assume that you want to create a reference line between two tables that are located quite far away from each other in your database diagram:

Tip #16 – Can I put the same table in the diagram twice?

Yes, you can! Shortcuts combined with subject areas might completely change your approach to database modeling. They allow you to make your diagram much more structured, logically divided and readable. Let’s look at an example. At the beginning, we have a really standard database model for a shop. Open your database model in Vertabelo: Now, we’re going to use subject areas in the model. To start, let’s put the whole model in a subject area:

Tip #15 – How to visually group tables and organize large database models using subject areas

Large models often happen to be quite messy. Using subject areas, you can improve the readability of your model and make it easier to work with. The idea behind subject areas is to group tables inside them according to their purposes – it allows you to create some logical structure in your model and makes navigation through it more natural. Open your database model in Vertabelo: To create a subject area, choose Add new area from the toolbox or press 7 on your keyboard:

Tip #14 – How to create a model preview link and embed the model in a website

When it comes to sharing things like documents or photos with other people, sending files to each other is becoming less and less common – we usually prefer to send links. They are quick, convenient and neither use up disk space nor make a mess in our file system. At Vertabelo, we know how inconvenient it can be to send files and that’s why we created public links for models.

Tip #13 – How to export selected tables as an image

Probably you have already generated a PNG image for your model, but did you know that the image may be generated for chosen elements only? Open your database model in Vertabelo: Select the desired objects with Ctrl + Click or using Select area from the toolbox: Click Export model as PNG image in the top toolbar: And this is your PNG image:

Tip #12 – The quickest possible way to create a new column

From our previous Tip #2 you could learn how to move between columns in your table using just arrow keys. Now, we will show you how to use the Down arrow to create one or even more new columns. Probably, this is the fastest way of creating new columns in this part of the galaxy. You really have to learn this. Open your database model and select the table in which you want to create a new column.

Tip #11 – Vertabelo reports that my data type is not supported. What can I do?

Sometimes you may want to use a data type that is so new that Vertabelo doesn’t recognize it. In such cases, the application displays a warning that the data type is not supported. If you find these warnings too distracting, you can turn them off. In this post, we will show you how to do it. Let’s take a look at the following example. Assume that you have a database model for MySQL 5.

24 Database Modeling Tips for Vertabelo

This one is frequently asked on our support: “In the data types panel, I can’t find the data type I need. Does this mean I cannot use it in Vertabelo?” Of course, you can. Vertabelo will never let you get stuck in a data type dead end. Even if the type you need is not listed, it doesn’t mean you cannot use it. Data types you can find under the button are just the most popular ones.

Tip #9 – How to create multiple references between two tables

Relationships in the real world may not be as easy as we would like them to be. Sometimes we want to model a situation where one table is refering to the other more than once. Luckily, with Vertabelo, this is a piece of cake. Let’s say we want to model a rental agreement between two people: landlord and tenant. In this situation, the rental_agreement table would need to refer to the person table twice – first for the landlord and second for the tenant.

Tip #8 – Setting Your Own Names for Primary Key

Sometimes the naming convention you use requires a specific pattern for the primary keys’ names. That’s why you may want to set your own names for each primary key in your database model instead of using default ones. Go on reading to get to know how to do this in Vertabelo. To give your own name to a primary key, select the table that contains the primary key you want to name:

Tip #7 – How to include comments in SQL script

You can comment on your database objects (tables, columns, views) in Vertabelo. You can also include this metadata in your database, where it can be accessed by your SQL developers or DBAs. Here’s how you can do it. Go to your database model: Click SQL generation settings in the Model properties panel on the right: Check the Include comments for database objects option: Let’s try out how it works.

Tip #6 – How to Create a Multicolumn Primary Key

Primary keys may contain more than one column. Multicolumn primary keys are frequently used for junction tables, which are used to model many-to-many relationships. Select a table: In the Table properties panel on the right, check all the columns that you want inside the key: Now, you have a multicolumn primary key created: You can check out your SQL code by clicking the SQL preview button in the top right corner:

Tip #5 – How to quote table names in generated SQL script

Sometimes, you want all identifiers in your SQL script to be quoted. For example, you want them to have a particular case. Luckily, Vertabelo allows you to quote all SQL identifiers in your generated script to prevent you from any SQL name conflicts. Go to your model: Click the SQL generation settings tab in the Model properties panel on the right: Check Quote all SQL identifiers:

Tip #4 – How to Make a Column Unique

Sometimes there are columns in a table that don’t belong to primary key, but are still unique. To mark them as a unique, you have to create an alternate (unique) key containing it. Single-column alternate (unique) key Select the table with the column you want to make a unique. Then, click the Alternate (unique) key tab in the Table properties panel on the right: Click Add key:

24 Database Modeling Tips for Vertabelo

Did you know that you can copy tables between models in Vertabelo? It’s useful for instance with tables that appear in almost every database model like user_account, address, client or product, or with tables that are specific for your domain. You don’t have to create all these tables from scratch. Open the model which contains the tables you want to copy and click to select them. Note that you can hold down the Ctrl key if you want to select objects located in different parts of your model:

24 Database Modeling Tips for Vertabelo

Would you like to make your database modeling faster and more convenient? Of course you would! One way to achieve this is to learn your database modeling tool’s keyboard shortcuts. To check them when working in Vertabelo, press Ctrl + I. Our favourite Vertabelo shortcuts Down arrow in the Columns section Did you know that you can move between columns in your table using arrow keys?

Vertabelo Advent Calendar

.advent-table { display: table; } .advent-row { display: table-row; } .advent-cell-left, .advent-cell-right { display: table-cell; vertical-align: middle; font-size: 20px; line-height: 1.25em; } @media all and (max-width: 767px) { .advent-table { display: block; } .advent-row { display: inline; } .advent-cell-left { display: block; font-size: 18px; } .advent-cell-right { display: block; margin-bottom: 30px; font-size: 16px; text-align: center; } } From today until Christmas Eve, we’re going to publish some tips & tricks for Vertabelo.

24 Database Modeling Tips for Vertabelo

Have you ever changed your mind about the order of columns in your table? You probably have! Fortunately, changing the order of columns in Vertabelo is as easy as pie. Select the table that contains the column you want to move up or down. In Table properties on the right, you can see a list of the columns. On the left of each column’s name, there is a column selector:

How to Color ERD Diagrams in Vertabelo

If you’ve ever had to design a database model with hundreds of tables, views and references, you know very well how difficult is to make such huge diagram readable and comprehensible. One of the possible solutions is to use some colors to distinguish different groups of tables or subject areas. See how Vertabelo allows you to do this quick and easy. To illustrate how you can color your entity relationship diagram to increase its readability, we will use a sample uncolored database model for a simple online store:

Vertabelo vs. Navicat Data Modeler

In this article, I’ll make a comparison of two popular database modelers: Vertabelo in version 1.21.0 and Navicat Data Modeler in version 1.0.12. Features are listed in the left-hand column and each tool’s feature support is identified under the appropriate heading. Vertabelo Navicat Data Modeler Online tool works under Chrome OS independent Standalone version available for: Linux Mac OS X Windows Model structure Tables References Sequences Views Text Notes Indexes Checks Additional SQL scripts Supported database engines PostgreSQL MySQL MS SQL Server Oracle SQLite HSQLDB IBM DB2 PostgreSQL MySQL MS SQL Server (Windows and Mac OS X editions only) Oracle SQLite SQL Azure (Windows and Mac OS X editions only) Supported data types Vertabelo supports a particular database from creation.

Comparison of Web-Based Tools for Data Modeling

In this article, I will compare two online database modelers: Vertabelo and Sea Quail Database Diagram Tool. Here is a matrix of each tool’s key features and functionality. Compared versions: Vertabelo 1.14.3, Sea Quail v.32. Vertabelo Sea Quail Model structure Tables References Sequences Views Text Notes Indexes Checks Additional SQL scripts Supported database engines PostgreSQL MySQL MS SQL Server Oracle SQLite HSQLDB IBM DB2 PostgreSQL MySQL MS SQL Server Supported data types Vertabelo supports particular database from the begining.

Online tools for trying out SQL design and queries

In this article I’m going to show you how to design a database, pour in some data, and finally execute queries. Everything will be done using only a ... web browser. That’s right, no installation, no license keys, no de-installation. Just switch to Google Chrome and follow along. Database design To design a database I will use Vertabelo. Since this is a Vertabelo product blog, the choice is obvious :)

Five reasons why we built Vertabelo

We are launching a new product on a market, so let me tell you the short story about how and why Vertabelo was born. e-point and I personally have more than fifteen years of experience in building business applications. All of them use relational databases as a storage for their data. Most of those applications are rather big - think about hundreds of tables in a database and hundreds of screens in a UI.