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Single Valued Normalisation Codd in the year 1972 formed three normal forms (1NF, 2NF, and 3NF). These were based on functional dependencies between the attributes of a relati
What is an Operand? The data on which the operation is to be performed is known as an Operand
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
External failure : A failure can also result because of an external cause, such as earthquakes, fire, floods, etc. The database must be duly backed up to avoid troubles occurring d
Define the terms i) Entity type ii) Entity set Entity type: An entity type describes a collection of entities that have the similar attributes. Entity set: The set of all en
Define the categories of SQL Statements? 1) Statements that don't return a result set. This statement class includes INSERT, DELETE, and UPDATE. 2)Statements that return
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
What is primary Key Explain? Primary Key - Primary key is one of the candidate keys. It should be selected such in which its attribute values are never, or very rarely, chang
what are the topics in data management
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