Final answer:
A primary key constraint is implemented using an index in the logical design.
Step-by-step explanation:
A primary key constraint is implemented using an index in the logical design. An index is a data structure that improves the speed of data retrieval operations on a database table. It allows for efficient searching, sorting, and joining of data. In the case of a primary key constraint, the index ensures that the primary key column(s) have unique values and can be used as a reference to enforce data integrity.
A primary key constraint is implemented using a constraint in the logical design of a database, ensuring data integrity and uniqueness in a table.
A primary key constraint is implemented using a constraint in the logical design of a database. The primary key serves as the unique identifier for each record in a database table. No two rows can have the same value for the primary key columns, and it must contain a value (i.e., it cannot be NULL). This ensures the integrity and uniqueness of the data within the table.
Other options like an index, trigger, and view serve different purposes in a database. An index is used to improve the performance of data retrieval. A trigger is a procedural code that is automatically executed in response to certain events on a particular table. A view is a virtual table based on the result-set of an SQL statement.