MySQL 5.7 sql_mode的改变
1、默认启用STRICT_TRANS_TABLES严格模式，该模式为严格模式，对数据会作严格的校验，错误数据不能插入报错，并且事物回滚。
2、MySQL5.6默认SQL_MODE模式为空。
表age字段是int，插入字符类时会报错，但sql_mode为空，所以数据可以插入。
图1
root@localhost:mysql3306.sock [sbtest]>desc t1; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | int(11) | NO | PRI | NULL | | | name | varchar(2) | YES | | NULL | | | age | smallint(6) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+
图2 （sql_mode设置为空）
root@localhost:mysql3306.sock [sbtest]>set sql_mode=‘‘; Query OK, 0 rows affected, 1 warning (0.02 sec) root@localhost:mysql3306.sock [sbtest]>insert into t1 values(1,‘aa‘,‘aaa‘); Query OK, 1 row affected, 1 warning (0.04 sec) root@localhost:mysql3306.sock [sbtest]>show warnings; +---------+------+----------------------------------------------------------+ | Level | Code | Message | +---------+------+----------------------------------------------------------+ | Warning | 1366 | Incorrect integer value: ‘aaa‘ for column ‘age‘ at row 1 | +---------+------+----------------------------------------------------------+ 1 row in set (0.00 sec)
图3 （插入成功）
root@localhost:mysql3306.sock [sbtest]>select * from t1; +----+------+------+ | id | name | age | +----+------+------+ | 1 | aa | 0 | +----+------+------+ 1 row in set (0.00 sec)
图4（改成STRICT_TRANS_TABLES，插入失败，事务回滚）
root@localhost:mysql3306.sock [sbtest]>set sql_mode=‘STRICT_TRANS_TABLES‘; Query OK, 0 rows affected, 1 warning (0.00 sec) root@localhost:mysql3306.sock [sbtest]>insert into t1 values(2,‘bb‘,‘bbb‘); ERROR 1366 (HY000): Incorrect integer value: ‘bbb‘ for column ‘age‘ at row 1 root@localhost:mysql3306.sock [sbtest]>select * from t1 where id=2; Empty set (0.04 sec)
MySQL管理之道-笔记-MySQL5.7 sql_mode的改变
原文：https://www.cnblogs.com/DBAshun/p/9257992.html