Enum Agg 

#[non_exhaustive]
pub enum Agg {
    Sum(String),
    Mean(String),
    Min(String),
    Max(String),
    Count,
    First(String),
    Last(String),
    NUnique(String),
}

Aggregation operation to apply within each group.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Sum(String)

Sum of a numeric column.

Mean(String)

Mean of a numeric column.

Min(String)

Minimum value.

Max(String)

Maximum value.

Count

Count of rows in each group (no column needed).

First(String)

First value of a column.

Last(String)

Last value of a column.

NUnique(String)

Count of unique values.

Trait Implementations

impl Clone for Agg

fn clone(&self) -> Agg

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Agg

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.