Question: Single-select QuestionImagine you have the database (relational schema) shown below with 5 tables, a table for Department, a table for Employee and a table for
Single-select QuestionImagine you have the database (relational schema) shown below with 5 tables, a table for Department, a table for Employee and a table for Customer. Salesman is a type of Employee. Subscription is a service that a Customer can pay for.
department (dptno CHAR(3), dptname CHAR(20), dptphone CHAR(15))
employee (eid CHAR(4), name CHAR(20), joindate DATE, dptnoFK CHAR(3))
customer (cid CHAR(6), cname VARCHAR(20), email VARCHAR(30), acquired INTEGER, dptnoFK CHAR(3), salesmanidFK CHAR(4))
subscription (subid CHAR(3), subname VARCHAR(20), desc VARCHAR(100))
subcustomer (cidFK CHAR(6), subidFK CHAR(3), startdate DATE)
Which is the correct SQL code to list the names of all customers whose sales was made by an employee whose name begins with J.
| A. | Select cname LIKEJ%from customer group by dptno | |
| B. | Select cname from customer where salesmanid LIKEJ% | |
| C. | Select cname from customer where salesmanid IN (select cid from customer where cname LIKEJ%) | |
| D. | Select cname from customer where salesmanid IN (select eid from employee where name LIKEJ%) |
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