Aggregate functions are functions that take a                        as input and return a single value.

Related MCQs

• The                    provides a set of operations that take one or more relations as input and return a relation as an output.
• Which of the following is correct regarding Aggregate functions?
• Which of the following is correct regarding Aggregate functions?
• SQL applies predicates in the                 clause after groups have been formed, so aggregate functions may be used.
• Let us consider phone_number ,which can take single or several values . Treating phone_numberas an                    permits instructors to have several phone numbers (including zero) associated with them.
• Let us consider phone_number ,which can take single or several values . Treating phone_numberasan _________ permits instructors to have several phone numbers (including zero) associated with them.
• An                          consists of a search-key value and pointers to one or more records with that value as their search-key value.
• An ____________ consists of a search-key value and pointers to one or more records with that value as their search-key value.
• A                on the attribute A of relation r consists of one bitmap for each value that A can take.
• PL/SQL has two types of subprograms, procedures and functions. Which subprogram isused to compute a value?