Final answer:
In the context of databases, a combination of column names and operators that evaluate to a single value is known as an expression, which is part of SQL used to calculate values.
Step-by-step explanation:
A combination of column names and operators that evaluate to a single value in the context of databases is known as an expression. Simply put, an expression can be seen as a formula that combines one or more values, operators, and SQL functions that compute a value. This is commonly used within SQL, the language for managing and manipulating relational databases.
In comparison, a view is a virtual table based on the result-set of a SQL statement, and a query is a request for data or information from a database table or combination of tables. A predicate, in a different context, can refer to descriptive terms that help analyze the relationship between objects and their attributes, but in databases, a predicate is part of a query that expresses conditions that the data must meet to be selected, updated, or deleted.