How to know when a MySQL table was last updated?

We can know this by using the column name "UPDATED_TIME" of information_schema.tables with a WHERE clause.

Let's first create a table for our example.

mysql> create table MyISAMTableDemo
   -> (
   -> id int
   -> );
Query OK, 0 rows affected (0.56 sec)

Inserting some records into the table.

mysql> insert into MyISAMTableDemo values(1);
Query OK, 1 row affected (0.72 sec)

mysql> insert into MyISAMTableDemo values(2);
Query OK, 1 row affected (0.16 sec)

Understand the syntax of last updated time.

SELECT UPDATE_TIME
FROM   information_schema.tables
WHERE  TABLE_SCHEMA = 'yourDatabaseName'
AND TABLE_NAME = 'yourTableName';

Let's implement the following query to get the last update time.

mysql> SELECT UPDATE_TIME
   -> FROM   information_schema.tables
   -> WHERE  TABLE_SCHEMA = 'business'
   ->  AND TABLE_NAME = 'MyISAMTableDemo';

The following is the output.

+---------------------+
| UPDATE_TIME         |
+---------------------+
| 2018-11-01 19:00:02 |
+---------------------+
1 row in set (0.08 sec)

The above is the detailed content of How to know when a MySQL table was last updated?. For more information, please follow other related articles on the PHP Chinese website!