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Whst is logical schema ? Logical schema is the entire database.
Before defines the second type of integrity constraint, viz., Entity Integrity, we should be well-known with the concept of NULL. Mostly, NULL is intended as a basis for dealing
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Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
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Question : (a) Differentiate between database integrity and database security (b) Database security involves measures to avoid loss of privacy and loss of confidentiality. D
WHAT IS SQL
ER diagram on cosmetics
Define seek time. The time for repositioning the arm is known as the seek time and it enhances with the distance that the arm is known as the seek time.
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