SQL Interview Questions | Find the manager name

Question

Refer to the following table and answer the questions related to it.

empid empname managerid deptid Salary
1 Emp1 0 1 6000
2 Emp2 0 5 6000
3 Emp3 1 1 2000
13 Emp13 2 5 2000
11 Emp11 2 1 2000
9 Emp9 1 5 3000
8 Emp8 3 1 3500
7 Emp7 2 5 NULL
3 Emp3 1 1 2000

 

The Employee and manager id are in the same table. Is it possible to get the manager names for the corresponding employee? How will you proceed for the same?

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Dhruv2301 55 years 3 Answers 1660 views Great Grand Master 1

Answers ( 3 )

  1. select e.empname, e.empid, m.empname as manager, e.managerid
    from emp e, emp m
    where e.managerid = m.empid

  2. select e1.empname, e1.empid, e2.empname as manager, from emp e1, emp e2 where e1.managerid = e2.empid

  3. Select e1.empname as Employee ,e2. empname as Manager from employees e1
    JOIN employees e2 ON
    e1.managerId=e2.empid;

  4. SELECT e.empname, m.empname AS manager_name
    FROM employees e
    JOIN employees m on e.managerid = m.employeeid;

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