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What is called a query evaluation plan?
A sequence of primitive operations that can be used to assess a query is a query evaluation plan or a query implementation plan.
what is Nested relational model? Explain with examples.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Explanation on Data Sharing?
What are the benefits of OOA technology? Using OOA technology can produce many benefits, such as: i) Reusability of code ii) Productivity is gained through direct mappi
Class Diagram A class diagram is required to support functional necessity of system. In a static design view, class diagram is used to model vocabulary of the system, simple c
What is the meaning of Data Independence ?
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
What are the General Transformation Rules for Relational operations? Ans: The transformation rules transform one relational algebra expression to AN EQUIVALENT ONE 1. E
Flights(FlightNo, DeptDateTime, Origin, ArrivalDateTime, Destination, Capacity, SoldSeats) Tickets(FlightNo, Seat, CustID) Where - flightNo is the PK of the flights table - DeptDa
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