drop table if exists t1,t2,t3;
flush status;
set autocommit=0;
create table t1 (a int not null) engine=innodb;
insert into t1 values (1),(2),(3);
select * from t1;
a
1
2
3
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
drop table t1;
commit;
set autocommit=1;
begin;
create table t1 (a int not null) engine=innodb;
insert into t1 values (1),(2),(3);
select * from t1;
a
1
2
3
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	0
drop table t1;
commit;
create table t1 (a int not null) engine=innodb;
create table t2 (a int not null) engine=innodb;
create table t3 (a int not null) engine=innodb;
insert into t1 values (1),(2);
insert into t2 values (1),(2);
insert into t3 values (1),(2);
select * from t1;
a
1
2
select * from t2;
a
1
2
select * from t3;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	3
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	0
begin;
select * from t1;
a
1
2
select * from t2;
a
1
2
select * from t3;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	3
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	3
insert into t1 values (3);
insert into t2 values (3);
insert into t1 values (4);
select * from t1;
a
1
2
3
4
select * from t2;
a
1
2
3
select * from t3;
a
1
2
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
show status like "Qcache_hits";
Variable_name	Value
Qcache_hits	4
commit;
show status like "Qcache_queries_in_cache";
Variable_name	Value
Qcache_queries_in_cache	1
drop table if exists t1;
CREATE TABLE t1 (id int(11) NOT NULL auto_increment, PRIMARY KEY  (id)) ENGINE=InnoDB;
select count(*) from t1;
count(*)
0
insert into t1 (id) values (0);
select count(*) from t1;
count(*)
1
drop table t1;