我的数据库中有两个表:表1(BonInterne):+---------+|num|+---------+|1|+---------+|2|+---------+|3|+---------+|4|+---------+表2(LigneBonInterne):+---------+-----------+|numOrdre|numBon|+---------+-----------+|20|1++---------+-----------+|21|2|+---------+-----------+|22|NULL++---------+-----------+|23|2|+-------