mysql5.7.21导入5.6的数据报Error

将MysqL的数据从5.6导入到5.7时，若时间的默认值为零会报错Error : Invalid default value for ‘comment_date’。

产生这个报错的原因：

NO_ZERO_DATE：在非严格模式下，可以插入形如“2014-07-17 23:29:00”的非法日期，MysqL数据库仅抛出一个警告。而启用该选项后，MysqL数据库不允许插入零日期，插入零日期会抛出错误而非警告。

解决方法如下：

MysqL -u root -p //登陆MysqL

Enter password:

Welcome to the MysqL monitor. Commands end with ; or g.

Your MysqL connection id is 26

Server version: 5.7.21 Homebrew

copyright (c) 2000, 2018, 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> set global sql_mode='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'

-> ;

Query OK, 0 rows affected, 1 warning (0.01 sec)

MysqL> commit;

Query OK, 0 rows affected (0.00 sec)

MysqL> exit;

重新创建数据库，导入数据即可。