mysql> CREATE TABLE daten_time (id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, data VARCHAR(64), ts TIMESTAMP);

 mysql> CREATE TABLE daten_random (id CHAR(32) NOT NULL PRIMARY KEY, data VARCHAR(64), ts TIMESTAMP);

 mysql> INSERT INTO daten_time VALUES ( NULL, 'Zeile 1', NULL); SELECT SLEEP(1);
 mysql> INSERT INTO daten_time VALUES ( NULL, 'Zeile 2', NULL); SELECT SLEEP(1);
 mysql> INSERT INTO daten_time VALUES ( NULL, 'Zeile 3', NULL); SELECT SLEEP(1);

 mysql> INSERT INTO daten_random VALUES ( MD5(CURRENT_TIMESTAMP()), 'Zeile 1', NULL); SELECT SLEEP(1);
 mysql> INSERT INTO daten_random VALUES ( MD5(CURRENT_TIMESTAMP()), 'Zeile 2', NULL); SELECT SLEEP(1);
 mysql> INSERT INTO daten_random VALUES ( MD5(CURRENT_TIMESTAMP()), 'Zeile 3', NULL); SELECT SLEEP(1);

 mysql> CREATE TABLE `daten_time` (
   `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
   `data` VARCHAR(64) DEFAULT NULL,
   `ts` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=4

 mysql> CREATE TABLE `daten_random` (
   `id` CHAR(32) NOT NULL,
   `data` VARCHAR(64) DEFAULT NULL,
   `ts` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT

 mysql> SELECT * FROM daten_time;
 +----+---------+---------------------+
 | id | data    | ts                  |
 +----+---------+---------------------+
 |  1 | Zeile 1 | 2015-09-13 15:24:05 |
 |  2 | Zeile 2 | 2015-09-13 15:24:06 |
 |  3 | Zeile 3 | 2015-09-13 15:24:07 |
 +----+---------+---------------------+

 mysql> SELECT * FROM daten_random;
 +----------------------------------+---------+---------------------+
 | id                               | data    | ts                  |
 +----------------------------------+---------+---------------------+
 | 47e0142a3638fdc24fe40d4e4fbce3f1 | Zeile 1 | 2015-09-13 15:24:12 |
 | b833c1e4c5bfc47d0dbe31c2e3f30837 | Zeile 3 | 2015-09-13 15:24:14 |
 | c7d46523a316de4e1496c65c3cbdf358 | Zeile 2 | 2015-09-13 15:24:13 |
 +----------------------------------+---------+---------------------+