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Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b
Write short notes on transaction state? A transaction may not always complete its implementation successfully such a transaction is termed aborted A transaction must be in o
Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the
What is Cross Product? Simply Cross product is Binary Operator
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
Explain Network Model in DBMS? Network Model - It was formalised within the late year of 1960s through the Database Task Group of the Conference on Data System Language (DBTG
what is un ordered and ordered file managment?
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