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Write short notes on domain relational calculus
The domain relational calculus uses domain variables that take on values from an attribute domain rather than values for whole tuple.
What will be create when a primary key if combined with a foreign key? A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that
Deadlock Prevention One of the easiest approaches for avoiding a deadlock would be to obtain all the locks at the begin of the transaction. Though, this approach restricts conc
Design a database for an airline.The database must keep track of customers and their reservations,flights and their status, seat assignment on individual flights and, the schedule
Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
define anomalies and different types of anomalies with example
recovey techniques based on deferred update and immediate update
does tables are called relations
3 assignments combined in 1
What are advantages of object models? Object models are efficient for communicating with the application experts and reaching a consensus about the significant aspects of the p
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