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 (a int primary key);
8
create table t2 (a int);
9
insert into t1 values (1);
10
insert into t2 values (1);
11
delete t1.* from t1, t2 where t1.a = t2.a;