diff --git a/README.md b/README.md index a24715b..38cd870 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 customer_id, city +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 customer_id, postal_code +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 supplier_id, phone +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 customer_id, order_date +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 supplier_id, company_name +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 contact_title +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 +150,10 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT count(o.order_date), c.Company_Name +FROM orders o RIGHT JOIN customers c +ON o.customer_id = c.customer_id +GROUP 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 +164,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT count(o.order_date), c.Contact_Name +FROM orders o RIGHT JOIN customers c +ON o.customer_id = c.customer_id +GROUP BY c.Contact_Name +ORDER BY count(o.order_date) 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 +179,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same ```SQL - +SELECT count(o.order_date), c.city +FROM orders o RIGHT JOIN customers c +ON o.customer_id = c.customer_id +GROUP BY c.city +ORDER BY count(o.order_date) DESC ``` ## Data Normalization @@ -177,35 +203,35 @@ 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 | Name | | | | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | +| 1 | Jane | | | | | | 2 | Bob | +| 3 | Sam | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -Table Name: +Table Name: Pets Table -| | | | | | | | | | +| Person ID | 1 | 2 | 3 | | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | -| | | | | | | | | | -| | | | | | | | | | +Pet Name: | Ellie | Joe | Ginger | | Type: | Dog | Horse | Dog +Pet 2: | Tiger | | Miss Kitty | Type 2: | Cat | | Cat +Pet 3: | Toby | | Bubble | | Type 3: | Turtle | | Fish | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -Table Name: +Table Name: Living Table -| | | | | | | | | | +| Person ID | 1 | 2 | 3 | | | | | | |------------|------------|------------|------------|------------|------------|------------|------------|------------| -| | | | | | | | | | +Fenced Yard | No | No | Yes | | City Dweller | Yes | No | No | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |