Q: Fill in the blank: A database schema must use _____ for each entry within the database in order to build connections between tables and enable users to combine relevant data.
or
Q: Complete the blank: For a database schema to create relationships between tables and allow users to compile pertinent data, _____ must be used for each entry in the database.
- data partitions
- unique keys
- system commands
- business rules
Explanation: A database schema must use unique keys for each entry within the database to build connections between tables and enable users to combine relevant data. Unique keys, such as primary keys, ensure that each record can be uniquely identified and related to other tables through foreign keys.
