The [MySQL] time field is set to the current time by default

1、 Add the column directly when creating the table and declare the default value , as follows ：

CREATE TABLE `table1` (
  `id` int(11) NOT NULL,
  `createtime` timestamp NULL default CURRENT_TIMESTAMP,
  `updatetime` timestamp NULL default CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

If it's in navicat In case of operation , Set the field type to timestamp, Write default CURRENT_TIMESTAMP, Here's the picture ：

 

2、 Add a new column to an existing table

ALTER TABLE table1
ADD COLUMN  `createtime` timestamp NULL DEFAULT CURRENT_TIMESTAMP

3、 Modify a column to time format and add default values

alter table table1 
 change createtime newtime timestamp null default current_timestamp

4、 Show milliseconds
If you want to record to milliseconds , Set up CURRENT_TIMESTAMP(3) that will do