Start learning 50% faster. Sign in now
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.
Five persons S, T, U, V and W have different weights. T is the lightest person. U is heavier than V but lighter than W. S is lighter than V. Who among t...
Which of the following box is kept immediate above box G?
How many floor between P and the one who likes WHITE?
Which of the following can be coded as ‘sip zdp’?
Seven boxes F, G, H, I, J, K and L, are placed one above the other. The bottommost box is numbered as 1 and the topmost box is numbered as 7. Both G and...
How many Pink does Aaryan have?
Which of the following is one of the choices of David?
Who among the following person stays on the ground floor?
How many teams play between the teams which play game R and W?
How many persons live between S and Z?