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timestamp « Data Types « MySQL Tutorial
MySQL Tutorial
Data Types
timestamp
10.24.timestamp
10.24.1.
The timestamp data type stores the time that a row was last changed
10.24.2.
TIMESTAMP NULL DEFAULT '0000-00-00 00:00:00'
10.24.3.
TIMESTAMP NULL DEFAULT NULL
10.24.4.
You can include the NULL attribute in the definition of a TIMESTAMP column to allow the column to contain NULL values. For example:
10.24.5.
mysql> SELECT MICROSECOND('2010-12-10 14:12:09.019473');
10.24.6.
TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP