2
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
5
drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
7
create table t1(n int auto_increment primary key, s char(10));
8
insert into t1 values (2,'old');
9
insert into t1 values(NULL,'new');
10
insert into t1 values(NULL,'new');
11
select * from t1 order by n;
15
delete from t1 where n = 2;
18
create table t2(n int);
20
insert into t1 values(NULL,'new');
22
insert into t1 values(NULL,'new');
24
delete from t1 where n=4;
26
select * from t1 order by n;