create table qrtz_cron_triggers(
sched_name varchar(120) not null,
trigger_name varchar(200) not null,
trigger_group varchar(200) not null,
cron_expression varchar(120) not null,
time_zone_id varchar(80),
primary key (sched_name,trigger_name,trigger_group),
foreign key (sched_name,trigger_name,trigger_group) references qrtz_triggers(sched_name,trigger_name,trigger_group)
)