How to get the last access (and/or write) time of a MySQL database?-Mysql Tutorial-php.cn

How to get the last access (and/or write) time of a MySQL database?

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Release： 2023-09-11 13:29:02

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如何获取 MySQL 数据库的最后访问（和/或写入）时间？

To get the last access time, try the following syntax -

SELECT update_time
FROM INFORMATION_SCHEMA.TABLES
WHERE table_schema = &#39;yourDatabaseName&#39;
AND table_name = &#39;yourTableName&#39;

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The above syntax gives the last access information about the MyISAM engine type.

Here, our database is "business" and we will use a table named "twoprimarykeytabledemo".

< p>To get the last access time of a MySQL database, use the following query.

Case 1 - The query is as follows-

mysql> SELECT update_time
   -> FROM INFORMATION_SCHEMA.TABLES
   -> WHERE table_schema = &#39;business&#39;
   -> AND table_name = &#39;twoprimarykeytabledemo&#39;;

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The output is as follows-

+---------------------+
| UPDATE_TIME         |
+---------------------+
| 2018-11-21 16:51:50 |
+---------------------+
1 row in set (0.24 sec)

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Case 2 -

mysql> SELECT update_time
   -> FROM INFORMATION_SCHEMA.TABLES
   -> WHERE table_schema = &#39;business&#39;
   -> AND table_name = &#39;currenttimezone&#39;;

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The output is as follows -

+---------------------+
| UPDATE_TIME         |
+---------------------+
| 2018-10-29 17:20:18 |
+---------------------+
1 row in set (0.20 sec)

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Case 3 - If your table engine type is InnoDB, then you will get NULL.

The query is as follows -

mysql> SELECT update_time
   -> FROM INFORMATION_SCHEMA.TABLES
   -> WHERE table_schema = &#39;business&#39;
   -> AND table_name = &#39;zerofilldemo&#39;;

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The following is the output -

+-------------+
| UPDATE_TIME |
+-------------+
| NULL        |
+-------------+
1 row in set (0.09 sec)

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