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Reflects organisational structure:Many organizations are distributed over various locations. If an organisation has many offices in dissimilar cities, databases used in such an application are circulated over these locations. Such an organisation may stay a database at every branch office having details of the staff that work at that location, the local properties that are for rent, etc. The staff at a branch office will create local inquiries to such data of the database. The company headquarters may wish to create global inquiries involving the access of data at each or a number of branches.
Why, generally does an object-oriented system use the relational DBMS? The reasons for using relational DBMS for OO systems could be any combination of following: a. Many or
Describe substring comparison in SQL. For the relation Person (name, address), write a SQL query that retrieves the names of people whose name starts along with ‘A' and address co
how can apply joins on table
What's the difference between a primary key and a unique key? Both primary key and unique key enforces uniqueness of the column on which they are explained. But by default prim
You group has been hired by TrainingrUs.com to keeps track of training revenues. TrainingrUS.com wants you to keep scheduling. COURSE table contains following information:
Illustration of implementation of inheritance Let us take the illustration of implementation of inheritance. Suppose that we are about to implement the Stack class and by now w
Explain the challenges before an E-business management.
Define Two phase commit Two phase commit: To make sure atomicity, all the sites where a transaction is being executed must agree on the final outcome of the execution. The tran
Scenario 1: Power goes out after the first instruction. What happens?
What are the failures of Controlling Events Between Objects Failure Unintentional termination of system. Several possible causes: failure of system hardware, o
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