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115 changes: 82 additions & 33 deletions README.md
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Expand Up @@ -14,7 +14,7 @@ Working with SQL

Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same data we used during the guided project.

* [ ] ***pgAdmin data refresh***
* [x] ***pgAdmin data refresh***

* Select the northwind database created during the guided project.

Expand All @@ -29,7 +29,7 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

### Answer the following data queries. Keep track of the SQL you write by pasting it into this document under its appropriate header below in the provided SQL code block. You will be submitting that through the regular fork, change, pull process

* [ ] ***find all customers that live in London. Returns 6 records***
* [x] ***find all customers that live in London. Returns 6 records***

<details><summary>hint</summary>

Expand All @@ -38,9 +38,13 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

SELECT contact_name, city
FROM customers
WHERE city = ('London')

```

* [ ] ***find all customers with postal code 1010. Returns 3 customers***
* [x] ***find all customers with postal code 1010. Returns 3 customers***

<details><summary>hint</summary>

Expand All @@ -49,9 +53,13 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

SELECT contact_name, postal_code
FROM customers
WHERE postal_code = '1010'

```

* [ ] ***find the phone number for the supplier with the id 11. Should be (010) 9984510***
* [x] ***find the phone number for the supplier with the id 11. Should be (010) 9984510***

<details><summary>hint</summary>

Expand All @@ -60,9 +68,13 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

SELECT contact_name, 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***
* [x] ***list orders descending by the order date. The order with date 1998-05-06 should be at the top***

<details><summary>hint</summary>

Expand All @@ -71,9 +83,13 @@ 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***
* [x] ***find all suppliers who have names longer than 20 characters. Returns 11 records***

<details><summary>hint</summary>

Expand All @@ -83,9 +99,13 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

SELECT contact_name
FROM suppliers
WHERE length(company_name) > 20

```

* [ ] ***find all customers that include the word 'MARKET' in the contact title. Should return 19 records***
* [x] ***find all customers that include the word 'MARKET' in the contact title. Should return 19 records***

<details><summary>hint</summary>

Expand All @@ -96,9 +116,13 @@ 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***
* [x] ***add a customer record for***
* customer id is 'SHIRE'
* company name is 'The Shire'
* contact name is 'Bilbo Baggins'
Expand All @@ -113,9 +137,12 @@ 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"_***
* [x] ***update _Bilbo Baggins_ record so that the postal code changes to _"11122"_***

<details><summary>hint</summary>

Expand All @@ -124,9 +151,13 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

UPDATE customers
SET postal_code = '11122'
WHERE customer_id = '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***
* [x] ***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***

<details><summary>hint</summary>

Expand All @@ -136,9 +167,15 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

SELECT c.company_name, COUNT(o.customer_id)
FROM customers c JOIN orders o
ON o.customer_id = c.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***
* [x] ***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***

<details><summary>hint</summary>

Expand All @@ -147,9 +184,15 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

SELECT c.contact_name, COUNT(o.customer_id)
FROM customers c JOIN orders o
ON o.customer_id = c.customer_id
GROUP BY c.contact_name
ORDER BY 2 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***
* [x] ***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***

<details><summary>hint</summary>

Expand All @@ -158,6 +201,12 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same

```SQL

SELECT c.city, COUNT(o.customer_id)
FROM customers c JOIN orders o
ON o.customer_id = c.customer_id
GROUP BY c.city
ORDER BY 2 DESC

```

## Data Normalization
Expand All @@ -177,41 +226,41 @@ 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 | Person |fenced yard |City Dweller| | | | | |
|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| 1 | Jane | 0 | 1 | | | | | |
| 2 | Bob | 0 | 0 | | | | | |
| 3 | Sam | 1 | 0 | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |

Table Name:
Table Name: Pet Types

| | | | | | | | | |
| id | pet type | | | | | | | |
|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| 1 | dog | | | | | | | |
| 2 | horse | | | | | | | |
| 3 | cat | | | | | | | |
| 4 | turtle | | | | | | | |
| 5 | fish | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |

Table Name:
Table Name: Pets

| | | | | | | | | |
| id | owner id | pet id | pet name | | | | | |
|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| 1 | 1 | 1 | Ellie | | | | | |
| 2 | 1 | 3 | Tiger | | | | | |
| 3 | 1 | 4 | Toby | | | | | |
| 4 | 2 | 2 | Joe | | | | | |
| 5 | 3 | 1 | Ginger | | | | | |
| 6 | 3 | 3 | Miss Kitty | | | | | |
| 7 | 3 | 5 | Bubble | | | | | |

Table Name:

Expand Down