Method group_by

src/query/helper.rs:277–283

Add a group by column ``` use sea_orm::{entity::*, query::*, tests_cfg::cake, DbBackend}; assert_eq!( cake::Entity::find() .select_only() .column(cake::Column::Name) .group_by(cake::Column::Name) .build(DbBackend::Postgres) .to_string(), r#"SELECT "cake"."name" FROM "cake" GROUP BY "cake"."name""# ); assert_eq!( cake::Entity::find() .select_only() .column_as(cake::Column::Id.count(), "count") .c

(mut self, col: C)

    /// );
    /// ```
    fn group_by<C>(mut self, col: C) -> Self
    where
        C: IntoSimpleExpr,
    {
        self.query().add_group_by([col.into_simple_expr()]);
        self
    }

    /// Add an AND HAVING expression
    /// ```