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SQL exercises on employee Database: List the employee name, and job_name who are not working under a manager

SQL employee Database: Exercise-26 with Solution

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26. From the following table, write a SQL query to find those employees who are not working under a manager. Return employee name, job name.

Sample table: employees


Pictorial Presentation:

SQL exercises on employee Database: List the employee name, and job_name who are not working under a manager

Sample Solution:

SELECT e.emp_name,
       e.job_name
FROM employees e
WHERE manager_id IS NULL;

Sample Output:

 emp_name     | job_name
--------------+--------------
  KAYLING     | PRESIDENT

Relational Algebra Expression:

Relational Algebra Expression: List the employee name, and job_name who are not working under a manager.

Relational Algebra Tree:

Relational Algebra Tree: List the employee name, and job_name who are not working under a manager.

Practice Online


Sample Database: employee

employee database structure

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Previous: From the following table, write a SQL query to find those employees who joined before 1st April 1991. Return employee ID, employee name, hire date and salary.
Next: From the following table, write a SQL query to find those employees who joined on 1st May 91. Return complete information about the employees.

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SQL: Tips of the Day

SQL Server SELECT into existing table. 

INSERT INTO dbo.TABLETWO
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:

INSERT INTO dbo.TABLETWO
  (col1, col2)
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

Database: SQL Server

Ref: https://bit.ly/3y6tpA3