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.
#question benefits and limitations of data models..
What functions does a data dictionary perform? In a (DBMS)data management system, the principal functions performed by the data dictionary are Management of data defini
how to make an e r diagram?
Describe five main functions of a database administrator. Ans: A database administrator (DBA) is a person who is accountable for the environmental aspects of a database. Genera
what is the relationship between receipt and owner entities in computer sales and service company
Explain recovery process after system failure using checkpoint. Ans: Checkpoint scheme or method is an extra component of the log based recovery system. This scheme is used to
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:
Describe logical data independence ? Logical Data Independence - It is the capacity to modify the conceptual schema without having to change external schemas or application p
using the invoice table shown below,write the relational schema,draw a dependencies,inclunding all partial and transitive dependencies.assume that the table does not contain repeat
These are the binary operations; i.e., each is applied to two relations or sets. These two relations can be union compatible excluding in case of Cartesian product. Two relations R
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