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Date: Sun, 9 Feb 2003 17:29:29 -0500
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Subject: order by date desc but NULLs last
From: "A.M." <agentm@cmu.edu>
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I have a simple query that sorts by descending date but the NULL dates 
show up first. Is there a way I can sort so they come last without 
sorting ascending?

SELECT submittime,score,gradedtime FROM student_gradedmaterial WHERE 
gradedmaterialid=3 and studentid=102 order by gradedtime desc;

      submittime      | score |         gradedtime
---------------------+-------+----------------------------
  2003-01-30 22:56:38 |       |
  2003-01-31 03:42:29 |    99 | 2003-02-06 14:21:43.043587

but what I want is all the graded items first in gradedtime desc and 
NULL afterwards. I do need to keep the NULL score rows. (So I get the 
latest submitted grade for the assignment but also any ungraded 
submission information.)

Thanks for any advice.
 ><><><><><><><><><
AgentM
agentm@cmu.edu