SYSFOREIGNKEYS???????????????

???????????????????????????????????????????????????????????????????????????

Derby ????????????????????????????????????????????????????????????????????????????????????????????????????????????SYSFOREIGNKEYS.CONGLOMERATEID??????????????????
?????? ??? ?????? ????????? ??????
CONSTRAINTID CHAR 36 false unique identifier for the foreign key constraint (join with SYSCONSTRAINTS. CONSTRAINTID)
CONGLOMERATEID CHAR 36 ?????? ?????????????????????????????????????????????????????????(SYSCONGLOMERATES. CONGLOMERATEID??????????????????)
KEYCONSTRAINTID CHAR 36 ?????? ???????????????????????????????????????????????????????????????????????????????????????????????????(SYSKEYS.CONSTRAINTID????????????SYSCONSTRAINTS. CONSTRAINTID)
DELETERULE CHAR 1 ?????? NO ACTION (??????)??????R???RESTRICT??????S???CASCADE??????C???SET NULL??????U
UPDATERULE CHAR 1 ?????? NO ACTION(??????)??????R???restrict??????S