To create a report displaying employee last names, department names, and locations. Which query should you use to create an equi-join?Select one:a.SELECT e.last_name, d.department_name, d.location_idFROM employees e, departments dWHERE manager_id =manager_id;b.SELECT last_name, department_name, location_idFROM employees , departments ;c.SELECT employees.last_name, departments.department_name,departments.location_id FROM employees e, departments dWHERE e.department_id =d.department_id;d.SELECT e.last_name, d.department_name, d.location_idFROM employees e, departments dWHERE e.department_id =d.department_id;
Question
To create a report displaying employee last names, department names, and locations. Which query should you use to create an equi-join?Select one:a.SELECT e.last_name, d.department_name, d.location_idFROM employees e, departments dWHERE manager_id =manager_id;b.SELECT last_name, department_name, location_idFROM employees , departments ;c.SELECT employees.last_name, departments.department_name,departments.location_id FROM employees e, departments dWHERE e.department_id =d.department_id;d.SELECT e.last_name, d.department_name, d.location_idFROM employees e, departments dWHERE e.department_id =d.department_id;
Solution
The correct answer is:
d. SELECT e.last_name, d.department_name, d.location_id FROM employees e, departments d WHERE e.department_id =d.department_id;
This query creates an equi-join between the employees and departments tables using the department_id field. This means that for each row in the employees table, the query will find a matching row in the departments table where the department_id fields are equal. The result will be a new table that includes the last name of the employee, the name of their department, and the location id of the department.
Similar Questions
Consider the tables with their respective fields below:employees: emp_id, dept_id, manager_id, last_namedepartments: dept_id, manager_id, dept_name, location_idYou want to create a report displaying employees last names, department names and locations, Which query should you use to create an INNER JOIN?1 point54321 ON e.dept_id = d.dept_id;JOIN departments dFROM employees eSELECT e.last_name, d.dept_name, d.location_id
For the following table:Employees (EmployeeId, EmployeeName, HireDate, Salary, ReportsTo)You want to identify the supervisor to which each employee reports. You write the following query.SELECT e.EmloyeeName AS [EmployeeName], s.EmployeeName AS [SuperVisorName] FROM Employees eYou need to ensure that the query returns a list of all employees and their respective supervisor. Which join clause should you use to complete the query?INNER JOIN Employees s ON e.ReportsTo = s.EmployeeId;INNER JOIN Employees s ON e.EmployeeId = s.EmployeeId;INNER JOIN Employees s ON e.EmployeeId = s. ReportsTo;RIGHT JOIN Employees s ON e. EmployeeId = s. ReportsTo;
You encounter the following statements:SELECT e1.ename|| 'works for '||e2.ename "Employees and their Managers" FROM emp e1, emp e2 WHERE e1.mgr=e2.empno; What kind of join is this?
You have two tables employee and department that have 10 records. In the given context, determine the type of join being used in the query given alongside.SELECT employee.emp_id, department.emp_id, name, dept_id FROM employee, department; Inner JoinOuter JoinEqui-JoinCartesian Join
Write query for the following.employee(id,name,salary,address)department(d_id,d_name,id)(1) Create a view department_details of department table.(2) To join two existing tables using inner join.(3) To drop a view
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.