Basic SELECT statement: Get the average salary and number of employees

MySQL Basic Select Statement: Exercise-8 with Solution

Write a query to get the average salary and number of employees in the employees table.

Sample table: employees

Code:

SELECT AVG(salary), COUNT(*) 
     FROM employees;

Relational Algebra Expression:

Relational Algebra Tree:

Pictorial Presentation of the above query

Result :

MySQL Code Editor:

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