a.
Explanation of Solution
SQL schema definition
- Person relation type is considered.
create type Person (ID integer, name varchar (30), address varchar (50))
create table person of Person
- Employee relation type is considered.
create type Employee under Person (salary integer)
create table employee of Employee under person
- Student relation type is considered...
b.
Explanation of Solution
SQL query to find the names of all people who are not secretaries
Query
select name from person where not exists
(select value(e) from employee e where value(e) is of (Secretary))
Explanation
- The “is of” type predicate is used to test object instance of a particular subtype or not...
c.
Explanation of Solution
SQL query to print the names of people who are neither employees nor students
Query
select name from person where not exists
((select value(p) from person p where value(p) is of (employee)) and (select value(p) from person p where value(p) is of (student))...
d.
Explanation of Solution
Reason for not creating a person who is an employee and a student
“No”, a person who is both an employee and a student cannot be created.
Reason
- Structured Query Language (SQL) does not support multiple inheritance.
- Different tables are used to store an employee or a student...

Want to see the full answer?
Check out a sample textbook solution
Chapter 8 Solutions
DATABASE SYSTEM CONCEPTS LCPO
- Ensure you answer the question asked at the end of the document. Do not just paste things without the GNS3 console outputsarrow_forward"Do not use AI tools. Solve the problem by hand on paper only and upload a photo of your handwritten solution."arrow_forward"Do not use AI tools. Solve the problem by hand on paper only and upload a photo of your handwritten solution."arrow_forward
- "Do not use AI tools. Solve the problem by hand on paper only and upload a photo of your handwritten solution."arrow_forward"Do not use AI tools. Solve the problem by hand on paper only and upload a photo of your handwritten solution."arrow_forwardSolve this "Do not use AI tools. Solve the problem by hand on paper only and upload a photo of your handwritten solution."arrow_forward
- "Do not use AI tools. Solve the problem by hand on paper only and upload a photo of your handwritten solution."arrow_forward"Do not use AI tools. Solve the problem by hand on paper only and upload a photo of your handwritten solution."arrow_forwardSpecifications: Part-1Part-1: DescriptionIn this part of the lab you will build a single operation ALU. This ALU will implement a bitwise left rotation. Forthis lab assignment you are not allowed to use Digital's Arithmetic components.IF YOU ARE FOUND USING THEM, YOU WILL RECEIVE A ZERO FOR LAB2!The ALU you will be implementing consists of two 4-bit inputs (named inA and inB) and one 4-bit output (named out). Your ALU must rotate the bits in inA by the amount given by inB (i.e. 0-15).Part-1: User InterfaceYou are provided an interface file lab2_part1.dig; start Part-1 from this file.NOTE: You are not permitted to edit the content inside the dotted lines rectangle. Part-1: ExampleIn the figure above, the input values that we have selected to test are inA = {inA_3, inA_2, inA_1, inA_0} = {0, 1, 0,0} and inB = {inB_3, inB_2, inB_1, inB_0} = {0, 0, 1, 0}. Therefore, we must rotate the bus 0100 bitwise left by00102, or 2 in base 10, to get {0, 0, 0, 1}. Please note that a rotation left is…arrow_forward
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education





