Attributes that do not exist in the physical database, but their values are derived from other attributes present in the database.
Types of Attributes • Simple attribute− Simple attributes are atomic values, which cannot be divided further. For example, a student's phone number is an atomic value of 10 digits. • Composite attribute− Composite attributes are made of more than one simple attribute. For example, a student's complete name may have first_name and last_name. • Derived attribute− Derived attributes are the attributes that do not exist in the physical database, but their values are derived from other attributes present in the database. For example, average_salary in a department should not be saved directly in the database, instead it can be derived. For another example, age can be derived from data_of_birth. • Single-value attribute− Single-value attributes contain single value. For example − Social_Security_Number. • Multi-value attribute− Multi-value attributes may contain more than one values. For example, a person can have more than one phone number, email_address, etc.
Weight of which of the following box is 8kg?
If ASHISH is related to Blue and SUNNY is related to Black in a certain way. Then, RAJIV is related to which of the following?
Which of the following combination is true?
Four of the following five are alike in a certain way and so form a group. Which is the one that one doesn’t belong to that group?
Which of the following subjects is studied by Ashish?
Which of the following combinations is correct
How many persons live between Deepa and Chand?
How many people live between the one who likes Fastrack and Casio?
Which of the following is one of the choices of David?
Box C is placed from which of the following place?