DbSchema Blog

Categories

• Cassandra
• Databases
• Dbschema features
• Design
• Firebird
• Mongodb
• Mysql
• Oracle
• Postgresql
• Release notes
• Snowflake
• Sql server
• Sqlite
• Tutorials

SQL Joins Explained - INNER, LEFT, RIGHT, FULL

Understand SQL JOINs with clear examples. Learn how INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN work and when to use each. Beginner-friendly.

Tutorials • 08-Aug-2025

What Are Aggregate Functions in SQL? Learn with Examples

Learn SQL aggregation functions like SUM, COUNT, and AVG with simple examples. Understand how they work and generate them visually in DbSchema.

Tutorials • 07-Aug-2025

What Is a Primary Key in SQL? Learn with Examples

A primary key is a column in a database table that uniquely identifies each row. Each table can have only ONE primary key, and it can’t be left empty.

Tutorials • 06-Aug-2025

Free SQL Tool to Understand Your Database Visually

Learn SQL faster with a free SQL client that shows your database visually in an ER diagram. See tables, relationships, query results, and edit data easily.

Dbschema features • 05-Aug-2025

How to Generate Database Documentation (HTML5, PDF, Markdown)

Generate interactive database documentation in HTML5, PDF, or Markdown using DbSchema. Add diagrams, comments, and sync everything with Git.

Dbschema features • 01-Aug-2025

What Is a Foreign Key Constraint in SQL?

A foreign key links one table to another by matching values, usually to a primary key. It keeps data accurate and prevents invalid references.

Tutorials • 31-Jul-2025

Visual Database Management & Design Tool for IBM Db2

Discover an ER diagram tool for IBM Db2 that simplifies schema modeling, database management, querying, Git integration, and documentation. Try it free for 30 days.

Databases • 25-Jul-2025

How to Design and Manage Apache Derby Databases Visually

Visual guide for Apache Derby: create diagrams, edit schema, sync changes, generate docs, and explore data. No SQL required. Try DbSchema free.

Databases • 24-Jul-2025

How to Create ER Diagrams for SQLite with a Free Tool

Create or explore ER diagrams for your SQLite database using a free modeling tool. Visual design, schema sync, Git support, and interactive documentation.

Sqlite • 23-Jul-2025

MongoDB Aggregation Pipeline Tutorial for Beginners in 2025

Understand MongoDB aggregation pipelines with clear examples. Learn how to filter, group, sort, and transform data step by step in this beginner-friendly guide.

Mongodb • 21-Jul-2025