What are database constraints?

Can you give examples?

Database Constraints are rules applied to ensure the integrity and accuracy of the data

within a database. Examples include:

• NOT NULL: Ensures that a column cannot have a NULL value.
• UNIQUE: Ensures all values in a column are unique.
• CHECK: Ensures that all values in a column satisfy a specific condition.
• DEFAULT: Sets a default value for a column if no value is specified.
• FOREIGN KEY: Ensures the value in one table corresponds to a valid value in

another table.