Timestamp not null default current_timestamp
- Timestamp not null default current_timestamp postgres
- Mysql timestamp not null default current_timestamp
- Created_at timestamp not null default current_timestamp
- Timestamp not null default current_timestamp on update current_timestamp
- Updated_at timestamp not null default current_timestamp on update current_timestamp
- Oracle timestamp not null default current_timestamp
- Mysql timestamp not null default current_timestamp on update current_timestamp
- Datetime not null default current_timestamp on update current_timestamp