How Can I Determine the Last Updated Date for My MySQL Tables?

Two methods to get the last updated date of a MySQL table

In the digital age, presenting the latest information is crucial. For some web pages, it is very valuable to display the last modification time of a specific MySQL table. This article will explore two methods of obtaining this information to help you present relevant data to your users.

Method 1: Using information_schema database

Modern MySQL versions include the information_schema database, which provides insights into other tables. By querying this database, you can extract the last updated date using the following query:

<code class="language-sql">SELECT UPDATE_TIME
FROM   information_schema.tables
WHERE  TABLE_SCHEMA = 'dbname'
   AND TABLE_NAME = 'tabname'</code>

Please note that this method requires a database connection.

Method 2: Create a timestamp file

Another approach is to create a timestamp file that is updated every time the MySQL table is modified. This file acts as a proxy for the last updated date.

• Database update: Open the timestamp file in read-write mode and close it to update its timestamp. Alternatively, you can use the touch() function to directly change the file's timestamp.
• The page shows: Use stat() to access the file again to retrieve its last modification time. This value represents the last update time of the MySQL table.

The above is the detailed content of How Can I Determine the Last Updated Date for My MySQL Tables?. For more information, please follow other related articles on the PHP Chinese website!