<Table> <Tr> <Th> SQL term </Th> <Th> Relational database term </Th> <Th> Description </Th> </Tr> <Tr> <Td> Row </Td> <Td> Tuple or record </Td> <Td> A data set representing a single item </Td> </Tr> <Tr> <Td> Column </Td> <Td> Attribute or field </Td> <Td> A labeled element of a tuple, e.g. "Address" or "Date of birth" </Td> </Tr> <Tr> <Td> Table </Td> <Td> Relation or Base relvar </Td> <Td> A set of tuples sharing the same attributes; a set of columns and rows </Td> </Tr> <Tr> <Td> View or result set </Td> <Td> Derived relvar </Td> <Td> Any set of tuples; a data report from the RDBMS in response to a query </Td> </Tr> </Table> <Tr> <Th> SQL term </Th> <Th> Relational database term </Th> <Th> Description </Th> </Tr> <Tr> <Td> Row </Td> <Td> Tuple or record </Td> <Td> A data set representing a single item </Td> </Tr> <Tr> <Td> Column </Td> <Td> Attribute or field </Td> <Td> A labeled element of a tuple, e.g. "Address" or "Date of birth" </Td> </Tr>

Which of the following is not an element of a relational database model