Question

I have the following table structure:

uid     | ... | created | ...
int(10) | ... | int(10) | ...

created field is filled with timestamps; here are the results of query SELECT created FROM mytable WHERE 1 LIMIT 5:

created
----------
1308122243
1308122243
1308552690
1309247417
1309254571

But when I execute SELECT DATE(created) FROM mytable WHERE 1 LIMIT 5, I get strange NULL’s:

DATE(created)
-------------
2013-08-12
2013-08-12
NULL
NULL
NULL

Why that happens?

Answer 1

You’re probably looking for

SELECT DATE(FROM_UNIXTIME(created)) FROM mytable WHERE 1 LIMIT 5