Let R and S be two relations with the following schema: R (P.Q. R1, R2, R3) S (P.Q S1, S2) Where (P, O) is the key for both schemas. Which of the following queries are equivalent? I. Ilp (R S) II. Ilp (R) IIp (S) Ilp (lp, (R) N Ip.Q (S)) lp (lp. (R) - (p.. (R) - Ilpo (S))) III. IV.

Q: Write the following queries, based on the database schema Product(maker, model, type) PC(model,…

A: As per our company guidelines, only 3 sub parts will be answered. So, please repost the remaining…

Q: It may be advantageous to keep the join as a materialized view if a parallel data-store is used to…

A: Performing a join: Consider the case when a cloud data storage service is utilized to store the two…

Q: The table STUDENT has the attributes STUDENT_ID, NAME, S_ID, and ADDR. The table SCHOOL has the…

A: Table STUDENT has the attributes( STUDENT_ID, NAME, S_ID, ADDR) and Table SCHOOL has Attribute…

Q: Normalization functional dependencies have what characteristics?

A: Functional dependencies It is a specific connection between two characteristics inside a table: main…

Q: Question 16 Suppose relations R(A,B) and S(B,C,D) are as follows: S A 1 3 5 7 9 Oc(4,4) O d. (7,9)…

A: Assume the following relations R(A, B) and S(B, C, D):RAB1234567892SBCD411672893444695query:SELECT…

Q: Type ISBN eBook RelationName2 (AttrName1) Primary key {AttrName1) Price Book N Order Hardcopy Date…

A: Here are the resulting relation tables from the given E-R diagram:Table Book:Primary Key:…

Q: Consider the following SQL query on the university schema:          select avg(salary)-(sum(salary)…

A: For numeric values it will always be zero. But when there is a null value the answer will be…

Q: Consider a database with the following relations: Employee (Employee ID, Name, salary, startDate)…

A: The following SQL Query can be broken down into sub-queries:   Sub-Query 1: Display Employees by…

Q: B2. Consider the following SQL query in the STUDENT relation. SELECT SNO FROM STUDENT WHERE…

A: B2. Consider the following SQL query in the STUDENT relation.SELECT SNO FROM STUDENTWHERE (CR_HOURS…

Q: Given the following table schemas (definitions) where "bid" is boat id, "brame" is boat name,…

A: SELECT query:In SQL, the SELECT statement is used to retrieve data from a database. It specifies…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: All lower case Underscore separator between root and suffix Foreign keys have the same name as…

Q: PLZ help with the following: IN SQL Let R (A, B, C) be a relation schema. What happens if we…

A: Relational schema refers to the meta-data that describes the structure of data within a…

Q: this information. Find all the candidate keys. What type of de

A: Relational Database A relation R is given which is R(A,B,C,D,E). It has the following functional…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: There is only one error in the above code and that is the ALTER TABLE command on the address table.…

Q: relational algebra

A: Note: As per the guidelines can answer the first three sections. Please re-submit the questions for…

Q: For the given schema, write relational algebra for the following queries. Student (id, name)…

A: 1). Answer πname(σcs3020=code(Student⋈EnrolledIn))   2). Answer πlecturer(σcode=cs1500 OR…

Q: Suppose relations R(A,B) and S(B,C,D) have the tuples shown below: 56 R 3 4 B S BCD 4 6 468 479…

A: The correct answer is given below with explanation

Q: Consider the following relation: r (A1, A2, A3). For all the states of the relation, the result of…

A: Query : database query is a request for data from a database. Primary key :  Primary key constraint…

Q: The relation R(a,b) may have duplicate tuples. Which of the following queries has a result that is…

A: We have been given some questions related to SQL queries and we need to choose correct statement for…

Q: For developing our queries, we will be using the following relational schema: Student(SID, name,…

A: Q1.  Here we need to join relation Course and Offering and use selection operator to select only…

Q: The table STUDENT has the attributes STUDENT_ID, NAME, SCHOOL_ID, and ADDR. The table SCHOOL has the…

A: In the realm of relational databases, it's essential to understand how to perform joins between…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: SQL: Database management is done using a programming language called SQL, or Structured Query…

Q: Consider the following relations for a Guest Room reservation application database. Room (room_id,…

A: Given Guest room reservation system contains two relations Room and Customer. Room relation contains…

Q: At UFL, each class is a specific offering of a course (subject). Each row in the Courses table…

A: At UFL, each class is a specific offering of a course (subject). Each row in the Courses table…

Q: Please help with the folllowing: Consider the following declaration of a relation schema…

A: QI:  Insert INTO R (B, C) Values (353, 'B');  Screenshot of SQL program for the above insertion…

Q: 5.6 LAB - Implement independent entity (Sakila) Implement a new independent entity phone in the…

A: First check whether phone_id column exists in your customer, staff, and store table or not. If…

Q: database Assume that you have the following relation; R(a,b,c) a   b  c ---------- 1  A   F 2…

A: Division operator A÷B can be applied if and only if: Attributes of B is proper subset of Attributes…

Q: I am getting an error about an existing constraint with the borrower_fkey for the borrower relation.…

A: Below is the answer with explanation:

Q: Consider the relational schema for a library system as given below: Member (mem _no, name, dob)…

A: Answer i)- select * from Member m where m.mem_no not in(select b.mem_no from Borrowed b);     Answer…

Q: Authorname, Book_type, Listprice, Author_affil, Publisher) Author_affil refers to the affiliation of…

A: (a) Explanation: =>Let say relation BOOK =R, Book_title = A, Author_name = B, Book_type = C,…

Q: Write 5 queries with explanations for online book store system,(USE MySQL) -- Write 5 queries. Your…

A: SQL is the structured query language, It's designed to facilitate the extraction the specific…

Q: The aim of assignment 1 is to implement a database schema and execute different types of SQL queries…

A: Note: In your schema, many table contain multiple primary key which is not possible in SQL database…

Q: create a Relational Schema by mapping

A: Relational Schema  Relation Primary Key Foreign Key…

Q: Normalize the following given data to 1/2/3 NF. State the relations schema after every…

A: The key for the given relation is (SID, CID)  The FD's possible are SID->s_name,  CID->C-name,…