public function distinct(bool $enable = true)
    {
        $this->changed = true;
        $this->distinct = $enable;

        return $this;
    }
public function distinct(bool $enable = true)
    {
        $this->changed = true;
        $this->distinct = $enable;

        return $this;
    }
public function distinct ( bool $ enable = true ) { $ this -> changed = true ; $ this -> distinct = $ enable ; return $ this ; }
Toggle the DISTINCT flag in a SELECT query.

@param bool $enable
@return self
Toggle the DISTINCT flag in a SELECT query .