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92 changes: 60 additions & 32 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT company_name, contact_name, city
FROM customers
WHERE city = 'London'
```

* [ ] ***find all customers with postal code 1010. Returns 3 customers***
Expand All @@ -48,7 +50,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT company_name, contact_name, city
FROM customers
WHERE postal_code = '1010'
```

* [ ] ***find the phone number for the supplier with the id 11. Should be (010) 9984510***
Expand All @@ -59,7 +63,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT company_name, 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***
Expand All @@ -70,7 +76,10 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT ship_name, ship_address, order_date
FROM orders
WHERE order_date IS NOT NULL
ORDER BY order_date DESC
```

* [ ] ***find all suppliers who have names longer than 20 characters. Returns 11 records***
Expand All @@ -82,7 +91,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT company_name, supplier_id
FROM suppliers
WHERE length(company_name) > 20
```

* [ ] ***find all customers that include the word 'MARKET' in the contact title. Should return 19 records***
Expand All @@ -95,7 +106,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT company_name
FROM customers
WHERE upper(contact_title) LIKE '%MARKET
```

* [ ] ***add a customer record for***
Expand All @@ -112,7 +125,8 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```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"_***
Expand All @@ -123,7 +137,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```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***
Expand All @@ -135,7 +151,10 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

Select c.company_name Customer, COUNT(*)
From orders o JOIN customers c
ON o.customer_id = c.customer_id
GROUP BY 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***
Expand All @@ -146,7 +165,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT c.contact_name contact, count(*)
FROM orders o JOIN customers c
ON c.customer_id = o.customer_id
GROUP BY c.contact_name
ORDER BY count 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***
Expand All @@ -157,7 +180,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT c.city city, count(*)
FROM orders o JOIN customers c
ON c.customer_id = o.customer_id
GROUP BY c.city
ORDER BY count desc
```

## Data Normalization
Expand All @@ -177,41 +204,42 @@ 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: PET TYPE

| | | | | | | | | |
| PET ID | PET TYPE | | | | | | | |
|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| 1 | Dog | | | | | | | |
| 2 | Cat | | | | | | | |
| 3 | Fish | | | | | | | |
| 4 | turtle | | | | | | | |
| 5 | Horse | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |

Table Name:
Table Name: PERSON/PET OWNER

| | | | | | | | | |
| PersonID |Person NAME | | | | | | | |
|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| 1 | Jane | | | | | | | |
| 2 | BOB | | | | | | | |
| 3 | sam | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |

Table Name:
Table Name: PETNAME/TYPE/OWNER

| | | | | | | | | |
| PET NAME PET ID | OWNER | | | | | | | |
|------------|------------|------------|------------|------------|------------|------------|------------|------------|
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| Ellie 1 1
JOE| | 5 | 2 | | | | | |
| Ginger | | | | | | | | |
| Tiger | 2 | 1 | | | | | | |
| MS. KITTY | 2 | 3 | | | | | | |
| | | | | | | | | |
| Toby | 4 | 1 | | | | | | |
| Bubble | 3 | 3 | | | | | | |

Table Name:

Expand Down