What is required for retrieving records from a relational database?

What is required for retrieving records from a relational database?

• A. A data mapping file
• B. A SQL query
• C. An API call
• D. A CSV export

Answer: (B)

Retrieving records from a relational database primarily requires using a Structured Query Language (SQL) query. SQL is the standard programming language specifically designed for managing and manipulating relational databases. Through SQL, users can perform a variety of operations, including querying data, updating records, and managing database structure. To retrieve data, one typically writes a SELECT statement specifying the columns of data to return from the desired tables. This allows for precise control over the exact information needed from the database. While the other options mentioned may be related to data handling, they serve different purposes. A data mapping file relates to how data elements are aligned and transformed but does not execute retrieval. An API call can indirectly access database records, but it operates through an intermediary interface rather than directly querying the database. A CSV export involves exporting data previously retrieved or stored in a database but does not encompass the database retrieval process itself. Thus, the requirement for retrieving records directly from a relational database is fulfilled by using a SQL query.

Retrieving records from a relational database primarily requires using a Structured Query Language (SQL) query. SQL is the standard programming language specifically designed for managing and manipulating relational databases. Through SQL, users can perform a variety of operations, including querying data, updating records, and managing database structure.

To retrieve data, one typically writes a SELECT statement specifying the columns of data to return from the desired tables. This allows for precise control over the exact information needed from the database.

While the other options mentioned may be related to data handling, they serve different purposes. A data mapping file relates to how data elements are aligned and transformed but does not execute retrieval. An API call can indirectly access database records, but it operates through an intermediary interface rather than directly querying the database. A CSV export involves exporting data previously retrieved or stored in a database but does not encompass the database retrieval process itself. Thus, the requirement for retrieving records directly from a relational database is fulfilled by using a SQL query.