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Define entity integrity and referential integrity. How does SQL allow specification of these? Ans: Entity Integrity Rule- If the attribute A of relation R is a prime attribut
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
What are the advantages of object oriented databases in comparison with others? Why it is still not widely used? Object oriented designs are coherent, efficient and less prone
Advantages of Data Distribution The primary benefit of distributed database systems is the ability to access and share data in a reliable and efficient manner.
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
For each 1: n relationship type R involving two entities E1 and E2, we recognize the entity type (say E1) at the n-side of the relationship type R and contain primary key of the en
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
Forward Recovery (Redo): In this system the committed changes made by a transaction are reapplied to a previous copy of the database. In simpler
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
Hello.I have database access assignment which consist of creation Form, Subform, Calculation, Macros
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