pub fn string_agg<C: ColumnKey>( _column: Column<C>, separator: &'static str, ) -> Keyed<Agg<StringAgg, C>, Cons<C::Table, Nil>, Nullable<Text>>where C::Sql: Concatenable,
string_agg(column, ", "). See StringAgg.
string_agg(column, ", ")
StringAgg