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Database System Concepts
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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Computer science 

Consider the following table schemas: Employee(ssn:string, fname: string, Iname: string, bdate: date, super_ssn:string, salary:real, dno:integer); Dependent(essn:string, dependent name:string,sex:string, bdate:date, relationship:string); Which one of the following implement the following query request? "List the names of all employees who have two or more dependents." a. O b. O c. d. e. SELECT Lname, Ename FROM EMPLOYEE WHERE SSN IN (SELECT ESSN FROM DEPENDENT WHERE Ssn = Essn AND COUNT(*)>= 2); SELECT Lname, Ename FROM EMPLOYEE WHERE (SELECT COUNT(*) FROM DEPENDENT WHERE Ssn = Essn HAVING COUNT(*) > 2; SELECT Lname, Ename FROM EMPLOYEE, DEPARTMENT WHERE Ssn = Essn AND COUNT (*)>= 2; SELECT Lname, Ename FROM EMPLOYEE WHERE (SELECT COUNT(*) FROM DEPENDENT WHERE Ssn = Essn) >= 2; SELECT Lname, Fname FROM EMPLOYEE WHERE SSN IN (SELECT ESSN Kalan süre 0:14:37 FROM DEPENDENT WHERE Ssn = Essn) >= 2;
Transcribed Image Text:Consider the following table schemas: Employee(ssn:string, fname: string, Iname: string, bdate: date, super_ssn:string, salary:real, dno:integer); Dependent(essn:string, dependent name:string,sex:string, bdate:date, relationship:string); Which one of the following implement the following query request? "List the names of all employees who have two or more dependents." a. O b. O c. d. e. SELECT Lname, Ename FROM EMPLOYEE WHERE SSN IN (SELECT ESSN FROM DEPENDENT WHERE Ssn = Essn AND COUNT(*)>= 2); SELECT Lname, Ename FROM EMPLOYEE WHERE (SELECT COUNT(*) FROM DEPENDENT WHERE Ssn = Essn HAVING COUNT(*) > 2; SELECT Lname, Ename FROM EMPLOYEE, DEPARTMENT WHERE Ssn = Essn AND COUNT (*)>= 2; SELECT Lname, Ename FROM EMPLOYEE WHERE (SELECT COUNT(*) FROM DEPENDENT WHERE Ssn = Essn) >= 2; SELECT Lname, Fname FROM EMPLOYEE WHERE SSN IN (SELECT ESSN Kalan süre 0:14:37 FROM DEPENDENT WHERE Ssn = Essn) >= 2;
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