How to insert a microsecond-precision datetime into mysql？

Question

I have a string like this:

2011-11-11 11:11:11.111111

and I need to insert it in MySql, into a datetime column. But after I insert it, it b

Answer 1

As documented under Fractional Seconds in Time Values:

A trailing fractional seconds part is permissible for temporal values in contexts such as literal values, and in the arguments to or return values from some temporal functions. Example:

mysql> SELECT MICROSECOND('2010-12-10 14:12:09.019473');
+-------------------------------------------+
| MICROSECOND('2010-12-10 14:12:09.019473') |
+-------------------------------------------+
|                                     19473 |
+-------------------------------------------+

However, when MySQL stores a value into a column of any temporal data type, it discards any fractional part and does not store it.

Note that this behaviour has changed in v5.6.4.