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# MLDataTable.JoinType

Join types available for [`MLDataTable`](/documentation/CreateML/MLDataTable) join operations.

```
enum JoinType
```

## Topics

### Selecting a joining operation

[`case inner`](/documentation/CreateML/MLDataTable/JoinType/inner)

An operation that joins the rows of the data tables whose values
match exactly.

[`case left`](/documentation/CreateML/MLDataTable/JoinType/left)

An operation that is the union between an inner join and the
remaining rows from the original data table.

[`case right`](/documentation/CreateML/MLDataTable/JoinType/right)

An operation that is the union between an inner join and the
remaining rows from the secondary data table.

[`case outer`](/documentation/CreateML/MLDataTable/JoinType/outer)

An operation that is the union between a left join and a right join.

## Relationships

### Conforms To

[`Equatable`](/documentation/Swift/Equatable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

[`Sendable`](/documentation/Swift/Sendable)

---

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