What do users write in order to interact with a database?

The correct answer is Structures Query Language (SQL). SQL is a standardized programming language specifically designed for managing and manipulating relational databases. Users write SQL queries to perform various operations such as retrieving, updating, inserting, and deleting data stored in the database. SQL provides a powerful framework for interacting with the database and allows users to perform complex queries and operations efficiently.

In contrast, while a data model is essential for defining how data is organized and how the relationships between different data elements are structured, it does not constitute a means for users to interact directly with the database. Query by Example (QBE) is another querying method which allows users to interact with databases in a more visual manner by filling in example forms. However, it is not as widely utilized as SQL in a variety of database management systems. A data gap analysis refers to assessing the differences between current data and desired data, which is unrelated to direct database interaction.

Overall, SQL is the foundational language through which users communicate their requirements to the database management system, making it the correct option in this context.