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Databases Chapter One

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Submitted By scrapinggoat
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Bouwsteen inleiding databases
Antwoorden op vragen 1.3 t/m 1.9 en 1.47

1.3.
Klant
Klantnummer | AchterNaam | VoorNaam | EmailAdress | 1 | Pietersen | Hendrink | hendrikpietersen@gmail.com | 2 | Jansen | Jan | janjansen@gmail.com |

Bestelling Klantnummer | AchterNaam | | EmailAdress | 1 | Pietersen | Hendrink | hendrikpietersen@gmail.com | 2 | Jansen | Jan | janjansen@gmail.com |

1.4
The primary keys are “klantnummer”. Yes, they could be surrogate keys.

1.5
The tables are related because ”Klantnummer from row “Klant” and “Klantnummer from row “Bestelling” are related, because I’ve made a relationship between the two tables.
The foreign key is Klantnummer.

1.6
Klant
AchterNaam | VoorNaam | EmailAdress | Pietersen | Hendrink | hendrikpietersen@gmail.com | Jansen | Jan | janjansen@gmail.com |

Bestelling AchterNaam | | EmailAdress | Pietersen | Hendrink | hendrikpietersen@gmail.com | Jansen | Jan | janjansen@gmail.com | Since the foreign key is now longer available, there is no relationship anymore between the two tables.

1.7
Data are recorded facts and numbers.
Information is knowledge derived from the data, the data presented in a meaningful context, and the data processed.

1.8
An example of information that can be determined used the two created tables are the email addresses of the orders of the users.

1.9
An example of a single-user database application could be a database used to keep track of your school grade. An example of a multi-user database application could be a database used to keep track of registered members, e.g. an online community.

1.47
The need for data integration drove the development of the first database technology.

Antwoorden op vragen 2.17 t/m 2.39

2.17
SELECT SKU, SKU_Description
FROM INVENTORY;

2.18
SELECT SKU_Description, SKU
FROM INVENTORY;

2.19
SELECT WarehouseID
FROM INVENTORY;

2.20
SELECT

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