Indexes are used: Indexes are special data structures that help speed up data retrieval. They act like signposts in a book, allowing the database to quickly locate data without having to scan through the entire database. Indexes are created on frequently searched fields, such as customer names or product IDs, to optimize performance.
Queries are used: Queries are used to request specific data from the database. They allow users to specify the criteria for the data they want to retrieve. Queries can be simple, such as selecting all customers from a particular city, or complex, such as finding all products that are in stock, below a certain price, and have a specific feature.
Data can be accessed concurrently: Multiple users can access and retrieve data from the database simultaneously. This is important in multi-user environments, such as e-commerce websites or customer relationship management (CRM) systems, where multiple users need to access the same data at the same time.
Data is backed up: Databases typically have built-in backup mechanisms to ensure that data is protected in case of hardware failures or other disasters. This ensures that data can be easily restored if needed, minimizing the risk of data loss.
Data is secure: Databases provide security features to protect sensitive data from unauthorized access. This includes features such as user authentication, access control, and encryption, ensuring that only authorized users can access and retrieve data.