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MVP and delete stretch done #19

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96 changes: 66 additions & 30 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 c.contact_name, c.city
FROM customers c
WHERE c.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 c.contact_name, c.postal_code
FROM customers c
WHERE c.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 s.phone
FROM suppliers s
WHERE s.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 +76,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT o.order_date
FROM orders o
ORDER BY o.order_date DESC
```

* [ ] ***find all suppliers who have names longer than 20 characters. Returns 11 records***
Expand All @@ -82,7 +90,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT s.company_name
FROM suppliers s
WHERE length(s.company_name) > 20
```

* [ ] ***find all customers that include the word 'MARKET' in the contact title. Should return 19 records***
Expand All @@ -95,7 +105,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```SQL

SELECT c.contact_title
FROM customers c
WHERE UPPER(c.contact_title) LIKE '%MARKET%'
```

* [ ] ***add a customer record for***
Expand All @@ -112,7 +124,8 @@ 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', 'Hobbit-Hole', 'Bag End', '111', 'Middle Earth')
```

* [ ] ***update _Bilbo Baggins_ record so that the postal code changes to _"11122"_***
Expand All @@ -123,7 +136,9 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```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***
Expand All @@ -135,6 +150,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```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

```

Expand All @@ -146,6 +166,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```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

```

Expand All @@ -157,6 +182,11 @@ Reimport the Northwind database into PostgreSQL using pgAdmin. This is the same
</details>

```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

```

Expand All @@ -177,41 +207,41 @@ 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 | persons |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 | | | | | |
| 5 | 2 | 2 | Joe | | | | | |
| 6 | 3 | 1 | Ginger | | | | | |
| 7 | 3 | 3 | Miss Kitty| | | | | |
| 8 | 3 | 5 | Bubble | | | | | |

Table Name:

Expand All @@ -232,7 +262,13 @@ Table Name:
* [ ] ***delete all customers that have no orders. Should delete 2 (or 3 if you haven't deleted the record added) records***

```SQL

DELETE
FROM customers
WHERE customer_id IN
(SELECT c.customer_id
FROM customers c LEFT JOIN orders o
ON c.customer_id = o.customer_id
WHERE o.order_id IS NULL)
```

* [ ] ***Create Database and Table: After creating the database, tables, columns, and constraint, generate the script necessary to recreate the database. This script is what you will submit for review***
Expand Down