22 Consider the following PDA then answer the questions below: A-show the computation of aabccc? B-what is the language accepted by the following PDA? Please add // between the two questions. Please use --> to represent the steps in computation. c, b →A с, а ->^ a,1→ a b, 1 → b c, b →A A, $ →$ 93 b, 1→ b 92 Enter your answer

22 Consider the following PDA then answer the questions below: A-show the computation of aabccc? B-what is the language accepted by the following PDA? Please add // between the two questions. Please use --> to represent the steps in computation. c, b →A с, а ->^ a,1→ a b, 1 → b c, b →A A, $ →$ 93 b, 1→ b 92 Enter your answer

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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2.1 Create a Scalar-valued function to get the total of the UnitCost, in the Products table. 2.2 Use the Scalar-valued function created in question 2.2 to print "The Total cost of the products we have is R", return the Total cost from the function in rands. Note: Use Database and tables created In Tsql CREATE TABLE Categories ( CategoryID int NOT NULL, CategoryName varchar(255), PRIMARY KEY (CategoryID)); CREATE TABLE Products ( ProductID int NOT NULL, ProductName varchar(255), MobileNumber varchar(255), ProductImage image, UnitCost int , Description varchar(255), CategoryId int,PRIMARY KEY (ProductID),FOREIGN KEY (CategoryId) REFERENCES Categories(CategoryId) ); CREATE TABLE Review( ReviewID int NOT NULL, ProductID int NOT NULL, CustomerName varchar(255), CustomerEmail varchar(255), Rating int, Comments varchar(255), PRIMARY KEY (ReviewID),FOREIGN KEY (ProductID) REFERENCES Products(ProductID) ); CREATE TABLE ShoppingCart( RecordID int NOT NULL,…
Q1) B) Consider you have library database, with the following relations: Book(bookID, name, auther, No.-of-pages, section-name, category) Section(section-name, section-admin, no-of-books, library-code, section-code) Library(library-name, address, phone-no., no-of-sections, manager-name, library-code) Answer the following: 1- specify the primary key(or keys) and the foreign key (or keys) in each relation. If a table does not have a foreign key, write None. 2- draw the schema diagram of the library database.
Sql
The actor in the UML use case diagram.5 :represents a user requirement True O False O
"6.1,6.2 & 6.1 are answered" The given problem has an entity relationship diagram where the requirement is to implement the diagram in the database , insert records in the tables and then perform the sql script execution to return the result of mentioned statements. **As per Bartleby guidelines, solving the first 3 sub-parts as the question contains many parts and the required parts to be answered is not mentioned. It will involve the below steps: Converting ERD to relational schema The database will need to create below tables: **Primary key is bold and underlined, Foreign key is italic Patient(Pat_ID, Pat_Name, Pat_Age, Pat_Gender) Doctor(Doc_ID, DOc_Name, Doc_EmployDate, Prc_ID) Consultation(Doc_ID, Pat_ID, Con_Date) Practice(Prc_ID, Prc_Name, Prc_YearEstablished, Prc_Province) 6.1 Create tables in SQL Below is the script to create the tables with attributes and foreign key constraints: //Script will create the database named TrueHealth and then populate the…
Use the following diagram to answer the proceeding questions (4, 5) nodeType *list, *first, *current, *last, *temp, *trail, *p, *q; list 47 12 92 65 80 46 5 78 first current temp last What is the value of each of the following relational expressions? a. p->link->link == current b. first->link->link->info == 92 c. temp->link == 0 d. last->link == nullptr e. list->link == p
|(b) Assume that relation PROJ is fragmented as PROJ1 = GPNOS"P2" (PROJ) PROJ2 = GPNO>"P2" (PROJ) Furthermore, relation ASG is indirectly fragmented as ASG1 = ASG PNO PROJ1 ASG2 = ASG PNO PROJ2 and relation EMP is fragmented as ΕMP1EP ENΟ ASG1 EMP2 = EMP ENO ASG2 Now, Transform the following query into a reduced query on fragments: SELECT ENAME FROM EMP, ASG, PROJ WHERE PROJ.PNO = ASG.PNO AND EMP.ENO = ASG.ENO AND PNAME= "Database Develop."
PLEASE TYPE ONLY**** ANSWER ALL THREE QUESTIONS Exercise 8.1.4: Arrow diagrams for relations on small finite sets. Draw the arrow diagram for each relation. (b) The domain of relation P is {2, 4, 8, 16, 32, 64}. For x, y in the domain, xPy if there is a positive integer n such that xn = y. (c) The domain of relation D is {2, 3, 12, 16, 27, 48}. For x, y in the domain, xDy if y is an integer multiple of x. (d) The domain for the relation A is the set {2, 5, 7, 8, 11}. For x, y in the domain, xAy if |x-y| is less than 2
Consider the following systems specification. If the transaction has an exclusive lock on the database element, then it can modify and read the element. If the transaction has a shared lock on the database element, then it can read the element, but can not modify it. The transaction either has an exclusive lock or a shared lock on the database element. Lets be the proposition: "The transaction has a shared lock on the database element," e: "The transaction has an exclusive lock on the database element," m: "The transaction can modify the database element," and r: "The transaction can read the database element." The translation of the specification into propositional logic is as follows: e → (r^m) s → (rA¬m) (e v s) ^ (e A S) Which of the following additions to the specification make it inconsistent. The transaction cannot read the database element. The transaction does not have an exclusive lock and cannot modify the database element. ☐The transaction does not have a shared lock and…
For the relational algebra queries, you can cut and paste the following as needed into your answer: p subscript (A) σ subscript (A) A ⋈ subscript B ρ (A(1→stuff), B) A ∩ B A U B symbol subscript1 ≤ subscript2 ˄ subscript3 ≥ subscript4 ˅ subscript5 < > subscript6 Consider the following database schema: Flights(flno, from, to, distance) Aircraft(aid, aname, cruisingrange) Certified(eid, aid) Employees(eid, ename, salary) In the above schema, Employees describes all employees, while Certified represents the fact that a given employee is certified to fly a given aircraft. Thus, all employees who are pilots will be listed in Certified (and no other employees will). An aircraft is able to fly a given flight if the aircraft’s cruisingrange is at least as great as the flight’s distance. a) Express the following query in both (i) Relational Algebra and (ii) SQL: Find the departure airport (from) and arrival airport (to) of flights that are able…
Chapter 6, Exercise 8 From Murach's mysql 3rd edition I'm running a MySQL Database and trying to run the solution script for this exercise and continually run into this error: Error 1305 Function ap.GROUPING does not exist Here is the code -- taken straight from the solution code for that example: SELECT IF(GROUPING(terms_id) = 1, 'Grand Totals', terms_id) AS terms_id,IF(GROUPING(vendor_id) = 1, 'Terms ID Totals', vendor_id) AS vendor_id,MAX(payment_date) AS max_payment_date,SUM(invoice_total - credit_total - payment_total) AS balance_dueFROM invoicesGROUP BY terms_id, vendor_id WITH rollup;