diff --git a/README.md b/README.md index 1a7ce45..8e9a80d 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 LOWER(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 LOWER(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 company_name = 'The Shire' ``` * [ ] ***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(*) number_of_orders, c.company_name +FROM orders o JOIN customers c +ON c.customer_id = o.customer_id +GROUP BY c.company_name +ORDER BY c.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 +165,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT c.contact_name, COUNT(*) number_of_orders +FROM orders o JOIN customers c +ON c.customer_id = o.customer_id +GROUP BY c.contact_name +ORDER BY number_of_orders 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 +180,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT c.city, COUNT(*) number_of_orders +FROM orders o JOIN customers c +ON c.customer_id = o.customer_id +GROUP BY c.city +ORDER BY c.city ``` ## Data Normalization @@ -177,39 +204,39 @@ 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: Person_Table -| | | | | | | | | | +| Person_ID | Person_Name| Total_Pets | Fenced_Yard|City_Dweller| | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +| 1 | Jane | 3 | No | Ye | | | | | +| 2 | Bob | 1 | No | No | | | | | +| 3 | Sam | 3 | Yes | No | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -Table Name: +Table Name: Pet_Table -| | | | | | | | | | +| Pet_ID | Pet_Name | Pet_Type | | | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +| 1 | Ellie | 1 | | | | | | | +| 2 | Joe | 2 | | | | | | | +| 3 | Ginger | 1 | | | | | | | +| 4 | Tiger | 3 | | | | | | | +| 5 | Miss Kitty | 3 | | | | | | | +| 6 | Toby | 4 | | | | | | | +| | Bubble | 5 | | | | | | | -Table Name: +Table Name: -| | | | | | | | | | +| Species_ID |Species_Name| | | | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +| 1 | Dog | | | | | | | | +| 2 | Horse | | | | | | | | +| 3 | Cat | | | | | | | | +| 4 | Turtle | | | | | | | | +| 5 | Fish | | | | | | | | | | | | | | | | | | | | | | | | | | | |