MySQL5.6 the time type timestamp and datetime have changed significantly

Source: Internet
Author: User
In MySQL5.5 (or an older version of MySQL5.1), only one column of fields in a table of the timestamp type can have the automatic insertion time and update time, or only one column of fields can have the automatic insertion time, another field Column cannot

In MySQL5.5 (or an older version of MySQL5.1), only one column of fields in a table of the timestamp type can have the automatic insertion time and update time, or only one column of fields can have the automatic insertion time, another field Column cannot

In MySQL5.5 (or an older version of MySQL5.1), only one column of fields in a table of the timestamp type can have the automatic insertion time and update time, or only one column of fields can have the automatic insertion time, the website space, and the other field Column cannot have an automatic update time.

However, from MySQL5.6, the traditional concept is overturned. The Hong Kong server and the Hong Kong virtual host can all use the above conditions, and the datetime type also has the timestamp type function.

The following is a demo:

This is MySQL5.5 (only one column of fields in the timestamp type can have the automatic insertion time and Update Time ):

========================================================== ======================================

This is MySQL5.6 (multiple columns in a timestamp table can have automatic insertion time and Update Time ):

========================================================== ======================================

This is MySQL5.5 (only one column of fields can have an automatic insertion time, and the other column of fields cannot have an automatic update time)

========================================================== ======================================

This is from MySQL5.6 (one column of fields has an automatic insertion time, and the other column of fields can also have an automatic update time)

========================================================== ======================================

MySQL5.6 (the datetime type also has the timestamp type function)

========================================================== ======================================

Reference manual:

This article is from the "hechun's technical column" blog. Be sure to keep this source

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.