SQL Exercise: Employees and managers name separated by a string
SQL employee Database: Exercise-19 with Solution
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19. From the following table, write a SQL query to separate the names of employees and their managers by the string 'works for'.
Sample table: employees
Pictorial Presentation:
Sample Solution:
SELECT e.emp_name || ' works for ' || m.emp_name
FROM employees e,
employees m
WHERE e.manager_id = m.emp_id;
Sample Output:
?column? -------------------------- BLAZE works for KAYLING CLARE works for KAYLING JONAS works for KAYLING SCARLET works for JONAS FRANK works for JONAS SANDRINE works for FRANK ADELYN works for BLAZE WADE works for BLAZE MADDEN works for BLAZE TUCKER works for BLAZE ADNRES works for SCARLET JULIUS works for BLAZE MARKER works for CLARE (13 rows)
Explanation:
The provided query in SQL that selects the names of all employees along with their corresponding manager's name by joining the 'employees' table to itself using the "manager_id" and "emp_id" columns.
The "||" operator concatenates the "emp_name" column of the employee with the string " works for " and the "emp_name" column of their manager.
The WHERE clause includes the employees who have a corresponding manager in the 'employees' table.
Practice Online
Sample Database: employee
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Previous SQL Exercise: List the employees who joined in the month January.
Next SQL Exercise: List all the employees whose designation is CLERK.
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