13-relational_data.Rmd

# Relational data

**Learning objectives:**

- Recognize the **families of verbs** for working with relational data.
- Use **keys (primary, foreign, and surrogate)** to identify relations between tables.
- Use **mutating joins** to combine related tables.
- Use **filtering joins** to remove observations from a table.
- Recognize **common problems with joins.**
- Use **set operations** to combine or filter tables.

## Slide 1

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## Slide 2

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