How can I tell when a MySQL table was last updated?

We can know that with the help of the column name ?UPDATED_TIME' using information_schema.tables with WHERE clause.

Let us 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 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)

Syntax to know the last updated time.

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

Let us implement the following query to get the last updated 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)