Vztahy

In computer science, „Vztahy“ translates from Czech as „relationships.“ It refers to the connections or associations between various data entities in a database or data model. Relationships define how different data objects interact with one another and establish their dependencies.

In the context of databases, relationships are typically categorized into three main types:

1. **One-to-One (1:1)**: A single record in one table is associated with a single record in another table.
2. **One-to-Many (1:N)**: A single record in one table can be linked to multiple records in another table, while those multiple records are linked back to only that one record.
3. **Many-to-Many (M:N)**: Multiple records in one table can be associated with multiple records in another table, often requiring a junction table to manage the associations.

Understanding relationships is crucial for designing efficient databases, enabling data normalization, enforcing referential integrity, and facilitating complex queries and data retrieval. They define the structure of the data and are essential for relational database management systems to function optimally.