我有两个带有外键引用的表:CommTABLE:+----+------------+|ID|NAME|+----+------------+|1|commname1||2|commname2||3|commname3|+----+------------+LOCATIONTABLE:-COMM_IDFKtoComm-->id+---------+------+-----+|COMM_ID|FORM|TO|+---------+------+-----+|1|720|721||1|725|||1||766||1||||2|766|225||3|766|222|+---------+---