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order by date asc putting blank dates on the bottom

Posted on 2006-10-24
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Last Modified: 2008-02-01
Hi,

I'm doing a query where I want to sort the data by the column "shipdate".  The most recent ship dates should be on top.  Simple enough using order by date ASC.

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SELECT
name, dealer, orderid, shipdate
FROM tblOrders
ORDER BY shipdate ASC

HOWEVER, some of the shipdates are null and/or empty.  These ship dates are returning on the top of the returned query.  I want the rows with no ship date to appear on the BOTTOM of the query, after the rows that have a ship date in the proper order.

How can I do this?


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Question by:benjamintr
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snoyes_jw earned 50 total points
ID: 17798050
ORDER BY shipdate IS NULL OR shipdate = '', shipdate
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Author Comment

by:benjamintr
ID: 17798111
That works!  Could you provide a quick explanation for me of what's going on?
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LVL 33

Expert Comment

by:snoyes_jw
ID: 17798303
IS NULL return 0 if the value is not null, 1 if it is. 0 sorts before 1, so we have all not null and not empty values before all null or empty values.  Then within those two groups, we sort by shipdate.
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