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.
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
Aggregation Aggregation is stronger form of association. It represents the "has-a" or "part-of" relationship. An aggregation association depicts a complex object which is comp
Question 1: Define the term business intelligence tools? Briefly explain how the data from one end gets transformed into information at the other end? Definition Exp
Question 1 Discuss the classification of DBMS based on location of database Question 2 Explain with examples different SQL commands used for creating and deleting relations.
Hierarchical model is also known by? A hierarchical model is also known as a Tree structure.
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
Describe file organisation? A file is organized logically as a sequence of records. These records are mapped onto disk blocks. A) Fixed-Length Records Type deposit=record
Part 1: Security Plan Consider the Case study and identify 3 security requirements. For each of these security requirements: • Discuss the necessity for the feature and how
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al
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