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!
For problems 1-4, give all candidate keys for the tables with FDs specified. Composite candidate keys must be put in parentheses, and candidate keys must be separated with commas or otherwise clearly specified. For example, "A, B, C" means that there are three candidate keys, but "(ABC)" means that there is one composite candidate key and "(ABC), E" means that there are two candidate keys, the composite of three colums (A B C) plus the single column E. Please be very specific for full credit.
1. What is (are) the candidate key(s) for a table with columns A B C D E F G H I J and the following set of functional dependencies?
A B → J
D → B
J→ C E F G H I
2. What is (are) the candidate key(s) for a table with columns L M N O P Q and the following set of functional dependencies?
L→ M N
O → L P Q
3. What is (are) the candidate key(s) for a table with columns A B C D E F G H I and the following set of functional dependencies?
A → C D E F
E→G H I
6.What is (are) the candidate key(s) for a table with columns M N O P Q R S T U and the following set of functional dependencies?
M →N O P
O P →M
N → Q R S T
What is called an evaluation primitive? A relational algebra operation annotated with instructions on how to evaluate is known as an evaluation primitive.
What are the advantages and disadvantages of merging an association into a class? Advantages: i) Less number of tables ii) Faster performance due to the fewer tables
I want an iPad app that is a simple 1 page form to complete with text. The Objective is to allow a few dozen people of the same organization (they're all on iPad) to open the app,
Which sorting technique is used to sort databases, whose sizes are very big? Give one such algorithm. Why do sorting techniques like quicksort, insertion sort, etc. not applied
Define query optimization. Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
Boyce-Code Normal Form (BCNF) A relationship is said to be in BCNF if it is already in 3NF and the left hand side of each dependency is a candidate key. A relation who is in 3N
3NF Normal Form A relation schema R is in 3NF if it is in 2NF and for each FD X A either of the following is true X is a Super-key of R. A is a prime attribute of R
er diagram on cosmetics.
State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem
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