SQL Exercise: Find the highest salary from all the employees

SQL employee Database: Exercise-90 with Solution

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90. From the following table, write a SQL query to find the highest salary. Return highest salary.

Sample table: employees

Sample Solution:

SELECT max(salary)
FROM employees;

Sample Output:

   max
---------
 6000.00
(1 row)

Explanation:

The said query in SQL selects the maximum value of the salary column from the employees table. The MAX() function is used to retrieve the highest value of the salary column.

Relational Algebra Expression:

Relational Algebra Tree:

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Sample Database: employee

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