ERROR 1067 (42000): Invalid default value for 'created_at'

Question

When I tried to alter the table it showed the error:

ERROR 1067 (42000): Invalid default value for \'created_at\'

I googled for this error

Answer 1

For Mysql5.7, login in mysql command line and run the command,

mysql> show variables like 'sql_mode' ;

It will show that NO_ZERO_IN_DATE,NO_ZERO_DATE in sql_mode.

Try to add a line below [mysqld] in your mysql conf file to remove the two option, mine(mysql 5.7 on Ubuntu 16) is /etc/mysql/mysql.conf.d/mysqld.cnf

Now restart mysql. It works!