Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Discuss the types of integrity constraints in which must be checked for the update operations - Insert and Delete. Give examples.
Insert operation can violet any of the subsequent four constraints:
1) Domain constraints could be violated if given attribute value does not appear within corresponding domain. 2) Key constraints could be violated if given attribute value does not appear within corresponding domain. 3) Entity integrity can be violated if the primary key of the latest tuple t is NULL. 4) Referential integrity can be violated if value of any foreign key in t refers to a tuple in which does not exist in referenced relation.
Delete operation can violate only referential integrity constraints, if the tuple being deleted is referenced through the foreign keys from other tuples within the database.
external and internal mapping with examples
Control Files : The redo and control files logs support the rest of the architecture. Every database must have at least one control file, although you have more than one to guard
MOSS VALE is a town with 15000 inhabitants. The fire department wishes to develop a system that automates the despatch of fire engines to attend fires. The ERD below describes the
Question: Data Mining is the process of extracting knowledge hidden from large volumes of raw data. (a) Using a suitable example, illustrate how Data Mining can be useful t
how to implement mid square hashing?
Advantages of Database management system Let us summarize the advantages. Reduction of Redundancy: This is perhaps the most important advantage of using DBMS. Redundancy i
3 assignments combined in 1
Higher Normal Forms Is there more normal forms beyond BCNF? Yes, though, these normal forms are not based on the concept of functional dependence. More normalisation is needed if
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
What are ways of finding out either an update is required or not for derived attributes? The ways to find out an update is required or, not are as: Explicit update
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd