SQL Skill Assessment #

As a Software Project Manager or Lead, it is crucial to hire developers who have strong SQL skills. Not only will this ensure that your database is well-maintained and efficient, but it will also save time and resources in the long run. But how can you assess the SQL skills of potential hires during the hiring process?

One effective method is to use online SQL skill assessments. These tests present candidates with problem statements that must be solved by writing a SQL query. The system will then compare the output of the query with the desired output, allowing you to accurately assess the candidate’s SQL scripting abilities.

SQL skill assessments are not only useful for hiring purposes but they can also be employed in academic settings to evaluate the SQL scripting abilities of students.

It is important to properly assess the SQL skills of candidates to ensure that you are hiring the best fit for your database team. By using online assessments and other techniques, you can accurately evaluate the SQL skills of potential hires and make informed hiring decisions.

Sample SQL Question

Write a SQL query that selects the names, salaries, and department names of all employees in the “employees” table who have a salary greater than 50000 and are in the “IT” department. Order the results by salary in descending order.

CREATE TABLE employees (

   employee_id INT PRIMARY KEY,

   first_name VARCHAR(50) NOT NULL,

   last_name VARCHAR(50) NOT NULL,

   salary INT NOT NULL,

   department_name VARCHAR(50) NOT NULL

);

Expected Output:

SQL Query

SELECT first_name, last_name, salary, department_name FROM employees 

WHERE salary > 50000 AND department_name = ‘IT’

ORDER BY salary DESC;

The candidate would need to write the query and test it using appropriate sql tool by running the query on the table and check the output with the expected output table.