Final answer:
In mathematics, set operations such as union, intersection, difference, and symmetric difference are types of queries that define specific relations or combinations of sets.
Step-by-step explanation:
In the context of set operations within the field of mathematics, the term used to refer to the queries is set operations themselves. These operations include union, intersection, difference, and symmetric difference, which are ways to combine or relate sets to each other. For example, the union of two sets A and B, denoted as A ∪ B, includes all elements that are in A, in B, or in both. The intersection of A and B, denoted as A ∩ B, includes all elements that are in both A and B. The difference between A and B, denoted as A - B or A \ B, includes elements that are in A but not in B. Lastly, the symmetric difference, denoted as A Δ B, includes elements that are in either set but not in both. Each of these operations can be seen as a type of query asking for a specific relation or combination of the input sets.