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!
Example:
Consider the following relations:
ROLLNO
NAME
ADDRESS
COURSE_ID
100
Kanupriya
234, Saraswati Vihar.
CS1
101
Rajni Bala
120, Vasant Kunj
CS2
102
Arpita Gupta
75, SRM Apartments.
CS4
STUDENT
Course
COURSE ID
COURSE_NAME
DURATION
BCA
3yrs
MCA
CS3
M.Sc.
2yrs
B.Sc.
CS5
MBA
If we want to show name of all the students with their course details then natural join is used in the following method:
STUDENT COURSE
Resultant relation will be as follows:
If R2 R3= R1 ÷ R2 If R2 R3= R1 ÷ R2
Student
234, Saraswati
Vihar.
Arpita
Gupta
75, SRM
Apartments.
There are some other types of joins like outer joins.
what is meant semantic query optimization? how does it differ from other query optimization techniques?
Briefly describe the different kinds of users of a DBMS. Ans: Different sorts of DBMS users are: (a) Software Engineers: These are the people accountable for developing ap
The File Based System File based systems are an early attempt to computerise the manual filing system. For example, a manual file can be set up to hold all the correspondence r
List the Armstrong's axioms for functional dependencies. What do you understand by soundness and completeness of these axioms? Ans: The Armstrong's axioms are: F1:
Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap
Normalization :It is a process of examine the given relation schemas based on their primary key and Functional Dependencies (FDs) to achieve the properties Minimizing redun
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
why we fregment at all?
The Database MySQL scripts cars_for_sale.sql and car_details.sql containing the data to use for this task have been supplied. To complete this task, you need to first create
What types of adjustments are required to increase chances of inheritance. a) Some attributes can be added or ignored in the base class operation b) Some changes can be
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