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Start learning 50% faster. Sign in nowTypes 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.
Mean of a grouped data calculated using direct method, assumed mean method or step deviation method:
The average of 20 numbers is calculated as 35. However, it was later discovered that one of the numbers was mistakenly recorded as 28 instead of 82. Wha...
The number 8192 is which term in the following geometric sequence 2, 8, 32, 128, . . . . . . .
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The 11th term of an AP is 80 less than the first term. If the second term is 88, find the third term.
You are provided with three sequences below. Determine the values of P, Q, and R, and then identify the relationship among them.<...
If the number 9458k2 is divisible by 8, then find the number of possible values of 'k'.
The sum of 6 consecutive odd numbers is 156. What will be the product of first number and the last number?
If P represents the largest single-digit prime number, determine the fourth proportional to the numbers (P + 3), (P - 2), and (P + 5).
Boat ‘A’ can cover 320 km in still water in 16 hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 5:3 and the sp...