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What is a PROJECT operation?
The project operation is a unary operation that returns its argument relation with particular attributes left out. Projection is shown by pie (π).
Describe the iterative and incremental life cycle For an iterative and incremental life cycle, two criteria are process and time. The main components of showing a project devel
Whst is logical schema ? Logical schema is the entire database.
What are wait-for-graphs?Give the algorithm to construct a wait-for-graph from a given schedule of transactions? How can deadlocks be detected from wait-for-graphs? Ans: The
Law Associates is a large legal practice based in Sydney. You have been asked to design a data model for the practice based upon the following specification: The practice employs
how to implement mid square hashing?
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
ALTER TABLE Command : This command is used for variation of existing structure of the table in the given situation: When a new column is to be added to the table structure.
The technique of converting the state diagram to code a) Identify all major control paths. Start from initial state; choose a path across the diagram that corresponds to normal
explain exhausitively the problems associated with er diagrams with ellustrations
Cardinality of Relationship One-to-One Only one entity of the first set is linked to only one entity of the second set. E.g. A teacher teaches a student. Only one teacher
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