Struct Aggregate 

pub struct Aggregate<'a, M: 'static, PK: 'static> { /* private fields */ }

Implementations

impl<'a, M: 'static, PK: 'static> Aggregate<'a, M, PK>

pub fn count(self) -> AggregateCount<'a, M, PK>

COUNT(*) over the matching rows. Always returns i64; empty matches yield 0 rather than NULL.

pub fn sum<C: IntoColumnName>(self, column: C) -> AggregateColumn<'a, M, PK>

SUM(<col>). Returns Option<T> — None when no rows match.

pub fn avg<C: IntoColumnName>(self, column: C) -> AggregateColumn<'a, M, PK>

AVG(<col>). Returns Option<T> — None when no rows match.

pub fn min<C: IntoColumnName>(self, column: C) -> AggregateColumn<'a, M, PK>

MIN(<col>). Returns Option<T> — None when no rows match.

pub fn max<C: IntoColumnName>(self, column: C) -> AggregateColumn<'a, M, PK>

MAX(<col>). Returns Option<T> — None when no rows match.

Trait Implementations

impl<'a, M: Clone + 'static, PK: Clone + 'static> Clone for Aggregate<'a, M, PK>

fn clone(&self) -> Aggregate<'a, M, PK>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, M: Debug + 'static, PK: Debug + 'static> Debug for Aggregate<'a, M, PK>

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

Formats the value using the given formatter.