Using Set Operators

This post is lab exercise I did on Querying with Transact-SQL edx course.

In this lab, I will use set operators to combine the results of multiple queries in the AdventureWorksLT database.

Retrieve Customer Addresses

• Retrieve billing addresses
  Write a query that retrieves the company name, first line of the street address, city, and a column named AddressType with the value ‘Billing’ for customers where the address type in the SalesLT.CustomerAddress table is ‘Main Office’.

SELECT c.CompanyName, a.AddressLine1, a.City, 'Billing' AS AddressType
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Main Office';

• Retrieve shipping addresses
  Write a similar query that retrieves the company name, first line of the street address, city, and a column named AddressType with the value ‘Shipping’ for customers where the address type in the SalesLT.CustomerAddress table is ‘Shipping’.

SELECT c.CompanyName, a.AddressLine1, a.City, 'Shipping' AS AddressType
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Shipping';

• Combine billing and shipping addresses
  Combine the results returned by the two queries to create a list of all customer addresses that is sorted by company name and then address type.

SELECT c.CompanyName, a.AddressLine1, a.City, 'Billing' AS AddressType
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Main Office'
UNION ALL
SELECT c.CompanyName, a.AddressLine1, a.City, 'Shipping' AS AddressType
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Shipping'
ORDER BY c.CompanyName, AddressType;

Filter Customer Addresses

• Retrieve customers with only a main office address
  Write a query that returns the company name of each company that appears in a table of customers with a ‘Main Office’ address, but not in a table of customers with a ‘Shipping’ address.

SELECT c.CompanyName
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Main Office'
EXCEPT
SELECT c.CompanyName
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Shipping'
ORDER BY c.CompanyName;

• Retrieve only customers with both a main office address and a shipping address
  Write a query that returns the company name of each company that appears in a table of customers with a ‘Main Office’ address, and also in a table of customers with a ‘Shipping’ address.

SELECT c.CompanyName
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Main Office'
INTERSECT
SELECT c.CompanyName
FROM SalesLT.Customer AS c
JOIN SalesLT.CustomerAddress AS ca
ON c.CustomerID = ca.CustomerID
JOIN SalesLT.Address AS a
ON ca.AddressID = a.AddressID
WHERE ca.AddressType = 'Shipping'
ORDER BY c.CompanyName;