SQL Server 2005: Order with NULL values at the end [duplicate]

问题

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Closed 7 years ago.

Possible Duplicate:
Case Order by using Null

I'm looking to get a list of records ordered by an "ordernum" field. The ordernum field is an int field. This field starts as NULL until set by a user. I would like the NULL entries to appear at the end of the list.

I am building a query as follows:

select *, case when (ordernum is null) then [largestInt] else ordernum end as newordernum
from tableName
order by newordernum

I know I could enter the value for the largest possible int for [largestInt], but I would like to replace [largestInt] with a variable. Is this possible?

回答1:

I found a way to order NULL values on the bottom.

http://sqlblog.com/blogs/denis_gobo/archive/2007/10/19/3048.aspx

It meets my needs quite nicely. My query is now:

select *
from tableName
order by case when ordernum is null then 1 else 0 end, ordernum

来源：https://stackoverflow.com/questions/11333863/sql-server-2005-order-with-null-values-at-the-end