diff --git a/README.md b/README.md index 1a7ce45..384f0c6 100644 --- a/README.md +++ b/README.md @@ -37,7 +37,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT * +FROM customers +WHERE city = 'London' ``` * [ ] ***find all customers with postal code 1010. Returns 3 customers*** @@ -48,7 +50,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT * +FROM customers +WHERE postal_code = '1010' ``` * [ ] ***find the phone number for the supplier with the id 11. Should be (010) 9984510*** @@ -59,7 +63,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT * +FROM suppliers +WHERE supplier_id = '11' ``` * [ ] ***list orders descending by the order date. The order with date 1998-05-06 should be at the top*** @@ -70,7 +76,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT * +FROM orders +ORDER BY order_date DESC ``` * [ ] ***find all suppliers who have names longer than 20 characters. Returns 11 records*** @@ -82,7 +90,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT * +FROM suppliers +WHERE length(company_name) > 20 ``` * [ ] ***find all customers that include the word 'MARKET' in the contact title. Should return 19 records*** @@ -95,7 +105,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT * +FROM customers +WHERE UPPER(contact_title) LIKE '%MARKET%' ``` * [ ] ***add a customer record for*** @@ -112,7 +124,8 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +INSERT INTO customers (customer_id, company_name, contact_name, address, city, postal_code, country) + VALUES ('SHIRE', 'The Shire', 'Bilbo Baggins', '1 Hobbit-Hole', 'Bag End', 111, 'Middle Earth') ``` * [ ] ***update _Bilbo Baggins_ record so that the postal code changes to _"11122"_*** @@ -123,7 +136,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +UPDATE customers +SET postal_code = '11122' +WHERE contact_name = 'Bilbo Baggins' ``` * [ ] ***list orders grouped and ordered by customer company name showing the number of orders per customer company name. _Rattlesnake Canyon Grocery_ should have 18 orders*** @@ -135,7 +150,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT count(o.customer_id) as totalCount, customers.company_name +FROM orders as o +INNER JOIN customers +on o.customer_id = customers.customer_id +GROUP BY o.customer_id, customers.company_name ``` * [ ] ***list customers by contact name and the number of orders per contact name. Sort the list by the number of orders in descending order. _Jose Pavarotti_ should be at the top with 31 orders followed by _Roland Mendal_ with 30 orders. Last should be _Francisco Chang_ with 1 order*** @@ -146,7 +165,12 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT count(o.customer_id) as totalCount, customers.contact_name +FROM orders as o +INNER JOIN customers +on o.customer_id = customers.customer_id +GROUP BY o.customer_id, customers.contact_name +ORDER BY totalCount DESC ``` * [ ] ***list orders grouped by customer's city showing the number of orders per city. Returns 69 Records with _Aachen_ showing 6 orders and _Albuquerque_ showing 18 orders*** @@ -157,7 +181,12 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT count(o.ship_city), customers.city +FROM orders as o +INNER JOIN customers +on o.ship_city = customers.city +GROUP BY o.ship_city, customers.city +ORDER BY customers.city ``` ## Data Normalization @@ -177,53 +206,53 @@ Below are some empty tables to be used to normalize the database * Not all of the cells will contain data in the final solution * Feel free to edit these tables as necessary -Table Name: +Table Name: Persons -| | | | | | | | | | +| id | name |Fenced Yard |City Dweller| | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +| 1 | Jane | No | Yes | | | | | | +| 2 | Bob | No | No | | | | | | +| 3 | Sam | Yes | No | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -Table Name: +Table Name: Pets -| | | | | | | | | | -|------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +| id | name | pet_type_id| | | | | | | +|------------|-------------|------------|------------|------------|------------|------------|------------|------------| +| 1 | Ellie | 1 | | | | | | | +| 2 | Joe | 2 | | | | | | | +| 3 | Ginger | 1 | | | | | | | +| 4 | Tiger | 3 | | | | | | | +| 5 | Miss Kitty | 3 | | | | | | | +| 6 | Toby | 4 | | | | | | | +| 7 | Bubble | 5 | | | | | | | -Table Name: +Table Name: Pet_Types -| | | | | | | | | | +| id | name | | | | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +| 1 | Dog | | | | | | | | +| 2 | Horse | | | | | | | | +| 3 | Cat | | | | | | | | +| 4 | Turtle | | | | | | | | +| 5 | Fish | | | | | | | | | | | | | | | | | | | | | | | | | | | | -Table Name: +Table Name: Person_Pet -| | | | | | | | | | +| id | person_id | pet_id | | | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +| 1 | 1 | 1 | | | | | | | +| 2 | 1 | 4 | | | | | | | +| 3 | 1 | 6 | | | | | | | +| 4 | 2 | 2 | | | | | | | +| 5 | 3 | 3 | | | | | | | +| 6 | 3 | 5 | | | | | | | +| 7 | 3 | 6 | | | | | | | ---