1-Design a notepad database (you register: name, surname, academic title, telephones, emails addresses 2-Describe how SQL queries work: SELECT SalesOrderID, OrderDate, soh.CustomerID FROM [Sales].[SalesOrderHeader] soh INNER JOIN ( SELECT TOP 3 CustomerID , SUM(TotalDue) as TotalSales FROM [Sales].[SalesOrderHeader] soh GROUP BY CustomerID ORDER BY TotalSales DESC ) a on soh.CustomerID = a.CustomerID

3-Write a query to the database (use Data_2021_01_28.txt data for Platon platform): Find addresses of employees from a particular state using a subquery.