Function datafusion::functions_aggregate::expr_fn::first_value

source ยท 
pub fn first_value(
    args: Vec<Expr>,
    distinct: bool,
    filter: Option<Box<Expr>>,
    order_by: Option<Vec<Expr>>,
    null_treatment: Option<NullTreatment>
) -> Expr
Expand description

Returns the first value in a group of values.