[Problem:]
While adding new column to the table by alter method, I used this sql code
ALTER TABLE investments ADD bank TEXT;
ERROR 1067 (42000): Invalid default value for ‘created_at’
But An eeror came thought I tried various data type
ERROR 1067 (42000): Invalid default value for ‘created_at’
[solution]
The problem in my database is current mode is in the sql_mode
SO, in the sql I typed and hit the commend
set global sql_mode = 'ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';
and it solved the problem.