SESSION 1:
mysql> select * from t1;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.08 sec)

mysql> insert into t1 values(2);
Query OK, 1 row affected (0.60 sec)


SESSION 2:

mysql>  select * from t1;
+------+
| id   |
+------+
|    1 |
+------+
1 row in set (0.00 sec)

mysql>  select * from t1;
+------+
| id   |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.00 sec)


此時是自動提交:

新增引數:
autocommit =0

[
 
[email protected] ~]$ mysql -uroot -p123456
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.16-log Source distribution

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show variables like 'autocommit';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| autocommit    | OFF   |
+---------------+-------+
1 row in set (0.00 sec)



[
 
[email protected] ~]$ mysql -utest -p123456
Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.16-log Source distribution

Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>  show variables like 'autocommit';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| autocommit    | OFF   |
+---------------+-------+
1 row in set (0.00 sec)


引數已經生效:

SESSION 1:
mysql> select * from t1;
+------+
| id   |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.00 sec)

mysql> insert into t1 values(3);
Query OK, 1 row affected (0.00 sec)

mysql> select * from t1;
+------+
| id   |
+------+
|    1 |
|    2 |
|    3 |
+------+
3 rows in set (0.00 sec)


SESSION 2:
mysql> select * from t1;
+------+
| id   |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.00 sec)



更新測試:

SESSION 1：
mysql> update t1 set id=100 where id=1;
Query OK, 1 row affected (0.22 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql>  select * from t1;
+------+
| id   |
+------+
|  100 |
|    2 |
+------+
2 rows in set (0.00 sec)



SESSION 2：
mysql>  select * from t1;
+------+
| id   |
+------+
|    1 |
|    2 |
+------+
2 rows in set (0.00 sec)