Join Dependency Join decomposition is a further generalization of Multivalued dependencies. If the join of R1 and R2 over C is equal…
DBMS Tutorial
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QUESTIONS ON NORMALIZATION Question on Second Normal Form (2NF): 1. Given a relation R( A, B, C, D) and Functional Dependency set…
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Specialization Specialization is a top-down approach, and it is opposite to Generalization. In specialization, one higher level entity can be broken down…
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Views in SQL Views in SQL are considered as a virtual table. A view also contains rows and columns. To create the…
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Deadlock in DBMS A deadlock is a condition where two or more transactions are waiting indefinitely for one another to give up…
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Super Key in DBMS We can define a super key as a set of those keys that identify a row or a…
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Join Operations: A Join operation combines related tuples from different relations, if and only if a given join condition is satisfied. It…
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QUESTIONS ON THIRD NORMAL FORM To solve the question on 3 NF, we must understand it’s both definitions: Definition 1: A relational…
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SQL Aggregate Functions SQL aggregation function is used to perform the calculations on multiple rows of a single column of a table.…
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States of Transaction In a database, the transaction can be in one of the following states – Active state The active state…