src/db/Builder.class.php
public function fetchAllColumn() {
		return $this->db->fetchRows($this->toSql(), $this->getBindings(), PDO::FETCH_COLUMN);
	}
public function fetchAllColumn() {
		return $this->db->fetchRows($this->toSql(), $this->getBindings(), PDO::FETCH_COLUMN);
	}
Fetch all values of a single column from the result set into an array.

@return array