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Intermediate SQL

Employees With More Than Average Salary ChallengeEmployees With More Than Average Salary Challenge

I mentioned earlier that when a subquery is written in the WHERE section, we can use the IN operator and comparison operators.

For example, like this:

Following a similar algorithm, you'll need to complete the following task.

We'll be working with the employees table, which looks like this:

employee_id first_name last_name department salary hire_date
1 John Doe Engineering 80000.00 2015-03-01T00:00:00Z
2 Jane Smith Engineering 90000.00 2017-08-15T00:00:00Z
3 Alice Johnson Marketing 75000.00 2016-11-10T00:00:00Z
4 Bob Brown Marketing 72000.00 2018-06-25T00:00:00Z
... ... ... ... ... ...
100 William Solis Sales 55000.00 2020-05-01T00:00:00Z

Task

Find employees whose salary is above the average salary of all employees using a subquery in the WHERE section.

The resulting table should have 3 columns: first_name, last_name, and salary. Then, sort the result by salary from highest to lowest using ORDER BY.

Note

This syntax can be used as a great alternative to the HAVING clause.

Everything was clear?

Section 2. Chapter 4
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course content

Course Content

Intermediate SQL

1. Grouping

GROUP BYOrder of StatementsTotal Ride Time for Each Subway Line ChallengeAverage Student's Grade ChallengeSearching for the Top Math Students ChallengeHAVINGSeveral Aggregate Functions in the QueryMore Complex Filtering

2. Nested Subqueries

Nested QueriesNon-tech Department Employees ChallengeUsing Inner Subqueries in the FROM SectionEmployees With More Than Average Salary ChallengeUNION ClauseCombining Table Results

3. Joining Tables

JOIN 2 TablesGet Category By Product PriceGet Minimum Price By CategoryGet Product Amount By CategoryLEFT, RIGHT and INNER JOINsTable Join PracticeFULL JOIN Usage

4. DDL and DML in SQL

CREATE and ConstraintsALTER and INSERT OperationsDROP and TRUNCATEUPDATE and DELETE

Intermediate SQL

Employees With More Than Average Salary ChallengeEmployees With More Than Average Salary Challenge

I mentioned earlier that when a subquery is written in the WHERE section, we can use the IN operator and comparison operators.

For example, like this:

Following a similar algorithm, you'll need to complete the following task.

We'll be working with the employees table, which looks like this:

employee_id first_name last_name department salary hire_date
1 John Doe Engineering 80000.00 2015-03-01T00:00:00Z
2 Jane Smith Engineering 90000.00 2017-08-15T00:00:00Z
3 Alice Johnson Marketing 75000.00 2016-11-10T00:00:00Z
4 Bob Brown Marketing 72000.00 2018-06-25T00:00:00Z
... ... ... ... ... ...
100 William Solis Sales 55000.00 2020-05-01T00:00:00Z

Task

Find employees whose salary is above the average salary of all employees using a subquery in the WHERE section.

The resulting table should have 3 columns: first_name, last_name, and salary. Then, sort the result by salary from highest to lowest using ORDER BY.

Note

This syntax can be used as a great alternative to the HAVING clause.

Everything was clear?

Section 2. Chapter 4
toggle bottom row
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