Exam FC0-U61 topic 1 question 229 discussion

C. Not null D. Primary key Explanation: Database constraints are rules enforced on data in a database to ensure accuracy, consistency, and integrity. The two correct answers are: C. Not null – Ensures that a column cannot have NULL values, meaning data must be entered. D. Primary key – A unique identifier for a record in a table, ensuring that each row is distinct. Why not the other options? A. Column – A structural element in a table, not a constraint. B. Row – Represents a record in a table, but is not a constraint. E. Field – A single piece of data within a column, not a constraint. F. Table – A collection of rows and columns, but not a constraint. Other Common Database Constraints: Unique – Ensures all values in a column are distinct. Foreign Key – Enforces referential integrity between tables. Check – Ensures values meet a specific condition.