782
779
foreign key(pid) references t1(id) on delete cascade) engine=innodb;
783
780
insert into t1 values(0,0),(1,0),(2,1),(3,2),(4,3),(5,4),(6,5),(7,6),
784
781
(8,7),(9,8),(10,9),(11,10),(12,11),(13,12),(14,13),(15,14);
786
783
delete from t1 where id=0;
787
784
delete from t1 where id=15;
788
785
delete from t1 where id=0;