Suggest an editImprove this articleRefine the answer for “What is a relational database?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)A relational database (RDB) is a type of database where information is stored as tables, and relationships between data are expressed through shared fields (keys); every table usually has a primary key, a unique identifier for each record. **Key point:** relational databases use SQL to work with tables, run queries, and manage the relationships between them - for example, an "Employees" table and a "Departments" table can be linked through a `DepartmentID` field.Shown above the full answer for quick recall.Answer (EN)ImageA relational database (RDB) is a type of database where information is stored as **tables**, and relationships between data are expressed through **shared fields**. The core idea is that data is organized in a **structured, interconnected** way, so it can be efficiently searched, updated, and analyzed. ### Key points 1. **Tables (relations)**: data is stored in tables, every row is a record (e.g. an employee), every column is a field (e.g. name, age). 2. **Relationships between tables**: tables can be linked through shared fields (keys). For example, an "Employees" table and a "Departments" table are linked through a `DepartmentID` field. 3. **Uniqueness of data**: every table usually has a **primary key**, a unique identifier for every record. 4. **SQL**: relational databases use SQL to work with tables, run queries, and manage the relationships between them. Example: - The `Employees` table: `ID`, `Name`, `DepartmentID` - The `Departments` table: `ID`, `Name` The link through `DepartmentID` lets you find out which department each employee works in. Put simply, **a relational database is like a well-organized spreadsheet with several sheets, where data between sheets is linked and complex queries can be run to find the information you need**.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.