AC→D, AB→C, AB→D, AB→E

Q: Primary key of this relation is AB. What is the normal form of this relation given the following…

A: Given all attributes are atomic, hence it is in first normal form.   Primary Key is AB. So prime…

Q: Question: Consider the relation: R(A, B, C, D, E, F, G, H, I, J, K, L,M,N,O,P,Q), {A, B} is the…

A: R(A, B, C, D, E, F, G, H, I, J, K, L,M,N,O,P,Q) Candidate key: {A, B}, {C,D,E}Prime attributes Non…

Q: 3. Disprove the following rule: {B > CD, AB → E, E → C} |= {AE → CD} To disprove a rule, construct a…

A:

Q: B.  Draw the digraph of the relation on {a, b, c, d} 1.  {(a, b), (b, b), (b, c), (c, d), (d, a)}…

A: Digraph is a directed graph consists of a set of nodes and set of ordered pairs called edges. Here,…

Q: Analyze the following relation, a) write the types of functional dependencies; c) perform the…

A: For the above table, keys are not defined. Keys can be identified using real time conditions. For…

Q: Let R(A, B, C, D, E, F) be a relation with FD's: {D→ CE, C-→ BDE, E→ AD, AF→ E, B→ D}. Which of the…

A: The given functional dependency is, { D -> CE , C -> BDE , E -> AD , AF -> E , B -> D…

Q: What is the difference between a weak and a strong group of entities?

A: A weak group of entities typically has limited influence,power,cohesion,and resources,while a strong…

Q: Random Hospital Example ERD Problem Follow the Simple Procedure for ERD diagramming to design an…

A: ans given below

Q: Consider a relation R(A,B,C,D,E) with functional dependencies AB→C, A→D, and D→E. (a) What are…

A: (A ) keys for relation R) is AB   Reason : -- because key is column or set of columns using that you…

Q: Given the relations CLASS(ClassID, Cycle, Teachinghours) and STUDENT(StudentID, ClassID, StudName).…

A: Answer:- Option-(A)-A class must have at least a student.

Q: What's the difference between weak and strong entity sets?

A: What's the difference between weak and strong entity sets?

Q: QUESTION 8 Here's a relation (R), its attributes, and its functional dependencies (F): R(A, B, C, D,…

A: A functional dependency is defined as if in a relation A→B , the values in attribute A have the same…

Q: Normalization: elational schema and FR corresponding set of functio R = ABCDE FR = {AC, BD, C → A}

A: Tables are arranged using the normalization method in the database architecture to reduce data…

Q: ER-diagrams are high-level design of the Database. The given ER-diagram describes the Dentist…

A: Weak entities are represented with double rectangular box in the ER Diagram      office, supplier,…

Q: HouseSale (houseID, agentID, dateSold, commissionRate, interestRate) Where: dateSold →interestRate…

A: Answer: Given  HouseSale(houseId, agenId, dateSold, commisionRate, InterestRate)…

Q: Consider the following Relation instance of R1(A, B, C, D): A D Null Null 1 Null Null 1 1 Null 1 2 4…

A: A relation stores data about entities using database languages. The structure of a relation is…

Q: Given the relation R(C, D, E, F) and functional dependency: C-> DF Which of the following functional…

A: Answer to the above question is in step2.

Q: The distinction between a weak and a strong entity collection has to be clarified.

A: In the context of entity collections in a database or data modeling, the distinction between weak…

Q: Construct an ERD for Leslie’s Auto Sales. Make sure to denote your primary and foreign keys. Note:…

A: An ER diagram (Entity-Relationship diagram) is a graphical representation of entities and their…

Q: Given the relation R(A, B, C, D, E, F), the following functional dependencies exist: B --> C, D D…

A: Given : R(A, B, C, D, E, F) B --> C, DD --> F

Q: Let R(A, B, C, D, E, F) be a relation with FD's: {D → C, C → D, D → E, C → E, E → AD, AF → E, D →…

A: Let R(A,B,C,D,E,F) be a relation with FD's  :…

Q: Which of these FDs hold on the

A: Functional dependency: The columns of a relational table are functionally dependent on another…

Q: పిరరర్

A: We are given two entities and we are going to draw ER diagram for it. Two entities are: Author and…

Q: This question concerns the logical design of a relation schema LOAN describing the borrowing of a…

A: The relation schema:- LOAN(catalogNo, dateOut, memberNo, dateReturn)

Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.