: Timestamp : Data Types MySQL TUTORIALS
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Timestamp
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125.1 .
TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP
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125.2 .
mysql> SELECT MICROSECOND('2010-12-10 14
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125.3 .
You can include the NULL attribute in the definition of a TIMESTAMP column to allow the column to contain NULL values. For example
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125.4 .
TIMESTAMP NULL DEFAULT NULL
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125.5 .
TIMESTAMP NULL DEFAULT '0000-00-00 00
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125.6 .
The timestamp data type stores the time that a row was last changed
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TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP
