事务MySQL
当SQL语句中出现任何错误时,系统将自动回滚更改,如何启动事务 我有以下SQL语句事务MySQL,mysql,Mysql,当SQL语句中出现任何错误时,系统将自动回滚更改,如何启动事务 我有以下SQL语句 START TRANSACTION; BEGIN; INSERT INTO `users`(id,name,gender,email,age) VALUES(11121,'sss',0,'ssss',22); INSERT INTO `teachers`(`UserId`,`teachingSubject`) VALUES(11121,300); COMMIT; 当第二条语句计数器出现错
START TRANSACTION;
BEGIN;
INSERT INTO `users`(id,name,gender,email,age)
VALUES(11121,'sss',0,'ssss',22);
INSERT INTO `teachers`(`UserId`,`teachingSubject`)
VALUES(11121,300);
COMMIT;
当第二条语句计数器出现错误时,它不会回滚。为什么?“teachingSubject”是TINYINT(2),第二个语句将超出其范围。我想回滚所有语句
Below is my procedure.
mysql> source d:\s.sql
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 1 row affected (0.00 sec)
ERROR 1264 (22003): Out of range value for column 'te
Query OK, 0 rows affected (0.09 sec)
mysql> SELECT * FROM teachers
-> ;
+--------+-----------------+
| UserId | teachingSubject |
+--------+-----------------+
| 11111 | 1 |
| 11112 | 9 |
| 11113 | 100 |
+--------+-----------------+
3 rows in set (0.00 sec)
mysql> SELECT * FROM users;
+-------+--------+--------+----------------+------+
| id | name | gender | email | age |
+-------+--------+--------+----------------+------+
| 11111 | Killer | | ssss@sss | 12 |
| 11112 | sss | | ssss | 22 |
| 11113 | sss | | ssss | 22 |
| 11114 | sss | | ssss | 22 |
| 11115 | sss | | ssss | 22 |
| 11116 | sss | | ssss | 22 |
| 11117 | sss | | ssss | 22 |
| 11118 | sss | | ssss | 22 |
| 11119 | sss | | ssss | 22 |
| 11120 | sss | | ssss | 22 |
| 11121 | sss | | ssss | 22 |
| 12345 | Sefler | | sefler@125.com | 12 |
+-------+--------+--------+----------------+------+
12 rows in set (0.00 sec)
教师表中没有id=11121的记录,但用户表中没有。当int溢出时,MySQL不会抛出错误。相反,它只是将其截断为尽可能高的值。如果是未签名的tinyint,则为255。但不会抛出任何实际错误