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.
i have assignments I don''t have time to finish because of work and other assignments, can you help with this? All are from the book Darabase design, application development and a
Define the Third Normal Form: The third normal form (3NF) is a normal form employed in database normalization. 3NF was initially defined by E.F. Codd in 1971. Codd's definitio
Explain Data Sublangauges ? Data sublanguage: In relational database theory, the term sublanguage, first used for this purpose through E. F. Codd in the year of 1970, refers t
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
Define check point and its impact on data base recovery. Ans: There could be hundreds of transactions handled per minute, in a large on-line database system.
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
Funky Festivals Specification Funky Festivals organise music festivals which take place at various venues throughout the UK. A venue needs to be booked before a Festival can t
An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val
What are the advantages of object ID? The main advantages of Object IDs are as below: i) IDs are not changing ii) IDs are completely independent of the changes in data v
What is data independence? Data Independence: Techniques which permit data to be changed without affecting the applications in which procedure it. There are two types of data
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd