Articles related to Moon Modeler – a data modeling tool for both relational and noSQL databases.
Use crows foot notation to represent relationships between entities in an entity relational diagram. Entities are connected by lines, and symbols at the beginning or end of the line describe cardinality.
Relationship types and cardinality:
A crow’s foot graphics represents “many” or “infinite”.… Read the rest
Settings for MongoDB ER diagram graphics can be defined on two levels in Moon Modeler. On a project level and on a selected object level.
Click the MongoDB ER diagram area to make sure no object is selected. Then change the colors in section Graphics. Alternatively, edit Project properties and specify settings on tab Graphics of the modal form.… Read the rest
Entity relationship diagram describes the structure of the database. The entity relationship diagram shows entities (tables in relational databases) and relationships between tables that exist in the database. For a good database design, it is very important to have an entity relationship diagram.
In an entity relationship diagram, the basic elements are:
Moon Modeler is a data modeling tool. It also includes the ability to generate HTML reports and export diagrams to PDF. Thanks to this, it is also used as a database reporting tool among users.
The procedure is simple. Open your project and click on Report – Export to PDF on the main toolbar.… Read the rest
Moon Modeler allows you to define custom data types. If you need to use newly introduced data types, define them in the project settings. Then use these data types in your diagrams.
You can add new data types to your project visually. (Similar to defining TAGs in various web applications).… Read the rest
Default values can be in the Project settings. These options are of course dependent on the target platform, so the options for a MongoDB project will be different from the options for PostgreSQL or MySQL projects.
Project settings and Default values for MongoDB:
When it comes to forward engineering in Moon Modeler, it’s about generating the resulting script for the selected target platform.
In the case of relational databases such as PostgreSQL, MariaDB, MySQL or SQLite, it is the resulting SQL script. For MongoDB it is possible to generate a schema validation script and for platforms like Mongoose or GraphQL it is schema definition scripts.… Read the rest
Reverse engineering means retrieving information about the database structure. It is about finding out what objects exist in the database, such as tables, columns, views, procedures, etc., and what relationships exist between these objects. Based on this information, it is possible to draw an ER diagram in which the relationships can be clearly displayed.… Read the rest
You can save your database structures and schema designs in Moon Modeler into projects.
On the project overview page, you can search projects by name or platform, quickly find the platform for which the project was created, and also view examples on a separate tab.
Looking for a free ER diagram tool? There are many on the market and Moon Modeler is one of them.
This free ER diagram tool can be used to visually define smaller database structures for relational database systems such as MariaDB, MySQL, PostgreSQL, SQLite, and NoSQL databases such as MongoDB, or object-document mappers such as Mongoose.… Read the rest