1) Show all functional dependencies of the following fields:
Unit Price
Quantity
Extended Price
Here is the answer:
The functional dependencies of the following fields are:
Unit price:
Quantity:
Extended price:
1) Show all functional dependencies of the following fields: Unit Price Quantity Extended Price
Consider a table Inventory with the following functional dependencies: cus_code, prod_id cus_name,cus_address,prod_name,unit_cost, quantity cus_code cus_name, cus_address prod_id prod_name,unit_cost. a) In what normal form is relation R? Explain why? b) Is it possible to decompose R into a number of relations in order to achieve a higher normal form? Show the tables that result from the decomposition.
Consider a relation R(A,B,C,D,E) with the following functional dependencies: 8. AB C BCD CDE DEA (a) Specify all candidate keys for R. (b) Which of the given functional dependencies are Boyce-Codd Normal Form (BCNF) violations'? (c) Give a decomposition of R into BCNF based on the given functional dependencies. (d) Give a different decomposition of R into BCNF based on the given functional dependencies. (e) Give a decomposition of R into 3NF based on the given functional dependencies.
Consider a...
Q2: Explain with example the difference between super keys and functional dependencies in relational databases. Show how to find a key (super/candidate) for the following functional dependencies: ? = {?,?,?,?,?,?,?,?,?,?,?,?,?} ? = {?→????,?→???,?→?,??→?,??→?}
Determine the functional dependencies that exist in the following table and then convert the following table to an equivalent collection of tables that are in third normal form. Please show each step from first to third normal form. ITEM (TIEM_NUM, DESCRIPTION, ON_HAND, CATEGORY, STOREHOURSE, PRICE, (ORDER_NUM, ORDER_DATE, CUSTOMER_NUM, CUSTOMER_NAME, NUM_ORDERED, QUOTED_PRICE))
Language: SQL - Normalization and Functional
Dependencies
Part 4 Normalization and Functional Dependencies Consider the following relation R(A, B, C, D)and functional dependencies F that hold over this relation. F=D → C, A B,A-C Question 4.1 (3 Points) Determine all candidate keys of R Question 4.2 (4 Points) Compute the attribute cover of X-(C, B) according to F Question 43 (5 Points) Compute the canonical cover of F.Show each step of the generation according to the algorithm shown in class....
Q2: Explain with example the difference between super keys and functional dependencies in relational databases. Show how to find a key (super/candidate) for the following functional dependencies [10 points]: R = {A, B, C, D, E, F, G, H, I, J, K,L,M} F {A B C D E, E F G H I J,AI →K,AL →M} =
Consider the following definition of equivalent sets of functional dependencies on a relation: “Two sets of functional dependencies F and F’ on a relation R are equivalent if all FD’s in F’ follow from the ones in F, and all the FD’s in F follow from the ones in F’.” Given a relation R(A, B, C) with the following sets of functional dependencies: F1 = {A B, B C}, F2 = {A B, A C}, and...
Consider a relation R(A,B,C,D,E) with the following functional dependencies: 8. AB C BCD CDE DEA (a) Specify all candidate keys for R. (b) Which of the given functional dependencies are Boyce-Codd Normal Form (BCNF) violations'? (c) Give a decomposition of R into BCNF based on the given functional dependencies. (d) Give a different decomposition of R into BCNF based on the given functional dependencies. (e) Give a decomposition of R into 3NF based on the given functional dependencies.
1. Consider the relation PatientOf and the functional dependencies below. Describe, with examples, how redundancy, update, and delete anomalies can arise. PatientOf (patient_no, name, address, doctor_no, since) patient_no → name, address patient_no, doctor_no → since 2. Consider a relation with attributes R(A, B, C, D, E) that satisfies the following functional dependencies: AB → D AC → E BC → D D → A E → B Find all the keys that contain the attribute A.
Assume we have the following functional dependencies: - AB → D - C → E - E → C - C → A - A → C We decompose R into schemas R1(ABC) and R2(ABDE). Show whether it is dependency preserving by using one of the algorithms.