QUESTION: How are null values treated when one or more appears during the execution of a group function?
QUESTION: The city government has collected the following data on annual sales tax collections and new car registrations: Determine the following: (a) The least-squares regression…
QUESTION: “What do the ALL and ANY operators do when used in a subquery?”
QUESTION: “What is the SQL operator (i.e., keyword) used in conjunction with pattern matching?”
QUESTION: What is the result of an attempt to add, subtract, multiply, or divide two number fields, one of which contains a null value?
QUESTION: Which comparison operators can be used when searching for null values? Which comparison operators cannot be used when searching for null values? What is…
QUESTION: What is the difference between a character field that contains a null value and a character field that contains a single blank space?
QUESTION: “What is meant by the term division compatibility?”
QUESTION: Why does the relation create a result of a Projection operation on a relation that includes the primary key not contain fewer tuples than…
QUESTION: “What is a Cartesian product operation?”