True, the difference operator subtracts one table from the other.
What is the difference operator?
In relational database management system (relational dbms), the difference operator takes two sets and returns the values that are in the first set but not the second set. Aside the difference operator, they are two other relational set operators which are Union operator and intersection operator. All three set operators can be implemented in a databse management system using different queries. A Relational operators are used to compare two values and can sometimes be referred to as comparison operator.
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