## Tattoo_Artists

ArtistID | Name | Age | ExperienceLevel
--- | --- | --- | ---
1 | Alice | 30 | Intermediate
2 | Bob | 28 | Advanced
3 | Carol | 45 | Expert
4 | Dave | 67 | Beginner
5 | Eve | 19 | Novice

## Piercers

PiercerID | Name | Age | YearsOfExperience
--- | --- | --- | ---
1 | Frank | 30 | 10
2 | Grace | 29 | 5
3 | Harry | 35 | 15
4 | Ivy | 40 | 20
5 | Jack | 47 | 8

## Customers

CustomerID | Name | Age | PreferredServiceType
--- | --- | --- | ---
1 | Mary | 30 | Tattoo
2 | John | 28 | Piercing
3 | Anna | 45 | Tattoo
4 | Ben | 19 | Piercing
5 | Chris | 67 | Tattoo

## Appointments

AppointmentID | ServiceDate | ServiceType | TattooArtistID | PiercerID | CustomerID
--- | --- | --- | --- | --- | ---
|  |  | (→ Tattoo_Artists.ArtistID) | (→ Piercers.PiercerID) | (→ Customers.CustomerID)
1 | 2022-01-01 10:00:00 | Tattoo | 1 | 1 | 1
2 | 2022-01-01 11:00:00 | Piercing | None | 1 | 2
3 | 2022-01-02 10:00:00 | Tattoo | 2 | 2 | 3
4 | 2022-01-02 11:00:00 | Piercing | 3 | 3 | 4
5 | 2022-01-03 10:00:00 | Tattoo | 4 | 4 | 5