mysql参数允许插入空字符串而不是NULL

In my database tables there are fiels which can be NULL of different types: integer, date, datetime, etc.

The first of our computer treats well this code:

INSERT INTO table VALUES (..., '', '', ...)
INSERT INTO table VALUES (..., NULL, NULL, ...)

The second one treats only code with NULL, but gives error with empty string.

I wonder, how to change MySQL parameters to force the second one work properly.

Thanks in advance