usuń wszystkie rekordy z tabeli
DELETE FROM table_name;
jak usunąć wiersz w sql
delete from TableName where condition;
delete from scrumteam where firstname='Jack';
delete from scrumteam where JobTitle='SDET';
Usuń zapytanie
public function deletedata(){
$this->db->where('id', 2);
$this->db->delete('table_name');
}