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Define instance and schema?
Instance: Collection of data stored in the data base at a certain moment is
Schema: The overall design of the data base is known as the data base schema.
what are the type of the database
What is object containment? References among objects can be used to model dissimilar real-world concepts.
What is Functional Dependency? A Functional dependency is shown by X Y among two sets of attributes X and Y that are subsets of R specifies a constraint on the possible tuple
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
what are the states of transaction?
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
In a relation, tuples are not inserted in any definite order. Ordering of tuples is not defined as a part of a relation definition. Though, records may be structured later accordin
properties of derirable decomposition
What is meant by software and hardware RAID systems? RAID can be executed with no change at the hardware level, using only software modification. Such RAID implementations are
I need help with data warehousing and business intelligence course project about designing a data warehouse for a jewelry company that does not have one
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