Question

I have a column in database whose type is datetime. Each time user changes something this gets updated to note that user changed something on website at this date/time.

The query that im using is:

INSERT INTO Test(bunch columns, ChangedAt)  VALUES (bunch values, NOW())

Now after couple of days i checked the table and there was one row having this value for the ChangedAt column:

2020-11-14 00:00:00

any ides how the hell it got 2020? and why there is time 00:00:00

thanks

Answer 1

Only 2 possible reasons.
computer date was wrong… wich would be a coincidence to get 00:00:00

or the row was updated/inserted like that.

MySQL recognizes DATETIME and TIMESTAMP values in these formats:

As a string in either ‘YYYY-MM-DD HH:MM:SS’ or ‘YY-MM-DD HH:MM:SS’
format. A “relaxed” syntax is permitted here, too: Any punctuation
character may be used as the delimiter between date parts or time
parts. For example, ‘2012-12-31 11:30:45’, ‘2012^12^31 11+30+45’,
‘2012/12/31 11*30*45’, and ‘2012@12@31 11^30^45’ are equivalent.

As a string with no delimiters in either ‘YYYYMMDDHHMMSS’ or
‘YYMMDDHHMMSS’ format, provided that the string makes sense as a date.
For example, ‘20070523091528’ and ‘070523091528’ are interpreted as
‘2007-05-23 09:15:28’, but ‘071122129015’ is illegal (it has a
nonsensical minute part) and becomes ‘0000-00-00 00:00:00’.

As a number in either YYYYMMDDHHMMSS or YYMMDDHHMMSS format, provided
that the number makes sense as a date. For example, 19830905132800 and
830905132800 are interpreted as ‘1983-09-05 13:28:00’

as you can see.. it would be hard to insert a different value by mistake and get it inserted… 20201114000000 in your case…