Enum AggregateFunction 

pub enum AggregateFunction {
    Count(Option<String>),
    Sum(String),
    Avg(String),
    Min(String),
    Max(String),
}

An aggregate function applied to a column in a query.

Each variant maps to a SQL aggregate (COUNT, SUM, AVG, MIN, MAX). All variants except AggregateFunction::Count take the name of the column to aggregate over.

Variants

Count(Option<String>)

Count rows in the group.

None is equivalent to COUNT(*) and counts every row. Some(column) is equivalent to COUNT(column) and counts only rows where column is non-null.

Sum(String)

Sum the values of the given column (SUM(column)).

Avg(String)

Arithmetic mean of the given column (AVG(column)).

Min(String)

Minimum value of the given column (MIN(column)).

Max(String)

Maximum value of the given column (MAX(column)).

Trait Implementations

impl Clone for AggregateFunction

fn clone(&self) -> AggregateFunction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AggregateFunction

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AggregateFunction

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for AggregateFunction

fn eq(&self, other: &AggregateFunction) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for AggregateFunction

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for AggregateFunction

impl StructuralPartialEq for AggregateFunction