MySQL timestamp - how to default a timestamp field to "now"

Here's a quick example of how to default a MySQL timestamp field to "now", i.e., the current date and time. The following MySQL table definition shows a field named date_created that uses the now function to record the timestamp for when the row was created:

create table users (
  id int unsigned auto_increment not null,
  username varchar(32) not null,
  password varchar(32) not null,
  date_created timestamp default now()

Just to highlight it, the "MySQL timestamp default to now" field is this one:

date_created timestamp default now()

If you do a SQL insert into this table like this (skipping over the date_created field):

INSERT INTO users (username,password) 

the date_created timestamp field will default to the time the record was inserted into the MySQL table.