SQL按2个日期字段排序

Question

i am running a select query in MySQL:

SELECT * 
FROM table1 
ORDER BY IF(duedate = '0000-00-00 00:00:00', datetime_added, duedate) ASC

its ordering ASC but it puts all rows that have 0000-00-00 00:00:00 at the top but these should be at the bottom

How can I order my query in the following order:

duedate ASC
datetime_added ASC
sequence DESC

Answer 1

Try this:

SELECT * 
from table1 
ORDER BY IF(duedate = '0000-00-00 00:00:00', '9999-12-31', duedate),         
         datetime_added ASC,
         sequence DESC

Answer 2

you can do this by:

SELECT * from table1 
ORDER BY 
duedate ASC,
duedate = '0000-00-00 00:00:00',
datetime_added ASC,
sequence DESC