MySQL

Complete exercizes in all of these sections (https://www.w3resource.com/sql-exercises/sql-retrieve-from-table.php):  

 Retrieve data from tables 

Boolean and Relational Operators 

Wildcard and Special operators 

Aggregate Functions 

Formatting query output 

Query on Multiple Tables 

SQL JOINS 

SUBQUERIES 

FILTERING and SORTING on HR Database 

SUBQUERIES on HR Database J

OINS on HR Database 

SQL UNION  

Submit screenshots with YOUR (not copy/paste from solutuions) answers.