﻿ SQL exercises on employee Database: Display all the details of the employees whose commission is more than their salary - w3resource

# SQL exercises on employee Database: Display all the details of the employees whose commission is more than their salary

## SQL employee Database: Exercise-15 with Solution

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15. From the following table, write a SQL query to find those employees whose commission is more than their salary. Return complete information about the employees.

Sample table: employees

Pictorial Presentation:

Sample Solution:

``````SELECT *
FROM employees
WHERE commission>salary;
``````

Sample Output:

``` emp_id | emp_name | job_name | manager_id | hire_date  | salary  | commission | dep_id
--------+----------+----------+------------+------------+---------+------------+--------
66564 | MADDEN   | SALESMAN |      66928 | 1991-09-28 | 1350.00 |    1500.00 |   3001
(1 row)
```

Relational Algebra Expression:

Relational Algebra Tree:

## Practice Online

Sample Database: employee

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## SQL: Tips of the Day

MYSQL OR vs IN performance:

In many database servers, IN() is just a synonym for multiple OR clauses, because the two are logically equivalent. Not so in MySQL, which sorts the values in the IN() list and uses a fast binary search to see whether a value is in the list. This is O(Log n) in the size of the list, whereas an equivalent series of OR clauses is O(n) in the size of the list (i.e., much slower for large lists)

Ref: https://bit.ly/3PzLY69