date of birth determines a person's age.
Complex Attribute: A complex attribute is an attribute that is both composite and multivalued.
Potential to have more than one value for an attribute
single value attribute is one that holds a single value for a single entity. example:- name, roll_number... multivalued attribute is one that holds multiplevalues for a single entities. example:- degree(phd, mca)
A Complex attribute that is both Composite and Multi valued. Composite and Multivalued attributes can be nested arbitrarily to form a Complex attribute like Address.
what two courses of action are available to a designer who encounters a multivalued attribute
Multivalued dependencies are also referred to as tuple generating dependencies. After the Boyce -Codd normal form the results may be devoid of any functional dependencies but it may encounter multivalued dependencies as the multivalued dependencies also cause redundancy of data. For eg: If there are 3 attributes involved in a relation,A,B, and C.. Then for every value of A we will have respective values for B and C.. But it is a necessary in the 4th normal form that both B and C values are independent of each other. This is represented by .,, A->>B A->>C.. MVD or Multivalued Dependency is a dependency where one attribute value is potentially a "multivalued fact" about another and the attributes must be independent of each other.
A composite attribute consists of a group of values from more than one domain. For example, the Address attribute consists of several domains such as house number, street number, city, country, etc.
multivalued data
There are a few examples of economic attribute. One main example is water resources.
It is an attribute that does not occur in some candidate key.
An arcsine is any of the single- or multivalued functions which are inverses of the sine function.
Classical Logic allows two truth values, True and False. Multivalued or "many-valued logic" allows other kinds of truth values and it allows there to be more than two truth values.