SQL

/* Four SELECT statements needed in total to solve all queries below.

Query 1.

Write one SELECT statement to display SupplierID and Avg_UnitPrice of each supplier. Avg_UnitPrice is the average unit price of products of a supplier. Sort output by SupplierID.

Hint: all suppliers are included

Query 2.

Copy the statement of Query 1 and modify it to display SupplierID and Avg_UnitPrice of suppliers whose average unit price is between $15 and $22. Sort output by SupplierID.

Hint: 8 suppliers

Query 3.

Copy the statement of Query 2 and modify it to display SupplierID and Avg_UnitPrice of suppliers whose average unit price is ranked #1 and #2 (i.e., the highest two averages).

Hint: 3 suppliers

Query 4.

Copy the statement of Query 3 and modify it to display the same output plus two more columns: CompanyName and Phone of each included supplier.

Hint: 3 suppliers, join Suppliers table

*/

Object Explorer ConnectY& Database Diagrams System Tables External Tables Tables FileTables E dboCategories Columns O CategorylD (PK, int, not null) CategoryName(nvarchar(15), not null) Description (nvarchar(max), null) Keys Constraints Triggers Indexes Statistics dboProducts Columns ProductlD (PK, int, not null) ProductName(nvarchar(40), not null) os SupplierlD (FK, int, null) o CategorylD (FK, int, null) QuantityPerUnit (nvarchar(20), null) UnitPrice (money, null) UnitslnStock (smallint, null) UnitsOnOrder (smallint, null) ReorderLevel (smallint, null) Discontinued (bit, not null) Keys Constraints Triggers Indexes Statistics dboSuppliers Columns SupplierlD (PK, int, not null) CompanyName(nvarchar(40), not null. | ContactName (nvarchar(30), null) ContactTitle (nvarchar(30), null) Address (nvarchar(60), null) City (nvarchar(15), null) E Region (nvarchar(15), null) | PostalCode (nvarchar(10), null) | Country (nvarchar(15), null) | Phone (nvarchar(24), null) Fax (nvarchar(24), null) HomePage (nvarchar(max), null)