Final answer:
In terms of database systems, a record holds specific information about an entity, a report retrieves and presents data usefully, and a query selectively pulls data based on set filters.
Step-by-step explanation:
When considering the functions specific to data management and retrieval in a database system, we can identify the roles of records, reports, and queries as follows:
- Record: A record contains information related to a specific person or entity. Each record in a database corresponds to a row in a table, holding information like a student's name, age, or grades.
- Report: A report is used to retrieve and present information from a database in a format that is useful for decision-making. It compiles data based on certain criteria to answer who, what, when, where, why, and how questions, similar to the way grades are reported in categories such as A, B, C, etc., from recorded numerical scores.
- Query: A query can contain filters and is a request for data from a database. Through select statements and conditions, it pulls specific data based on those filters, such as selecting all students above a certain age.
Therefore, the correct answer to the question 'Which functions do each of the following perform?' is d. All of the above.