Final answer:
The operator used to find the difference between two sets is '-', similar to the subtraction of scalars or vectors.
Step-by-step explanation:
The operator used to find the difference of two sets is represented by the symbol '-'. For example, let's assume we have two sets, A and B. Set A = {2, 4, 6, 8, 10, 12, 14, 16, 18} and Set B = {14, 15, 16, 17, 18, 19}. When we subtract Set B from Set A, represented by A - B, we are essentially finding the elements that are present in Set A but not in Set B. The result of A - B would thus include only those elements that are unique to Set A. This is similar to the subtraction of scalars or vectors in mathematics.
When considering Boolean operators, which are fundamental in database searches and mathematical logic, 'AND' corresponds to the intersection of two sets, 'OR' corresponds to the union of the two sets, and 'NOT' is used to exclude elements from a set.