使零出现在升序数字列表的最后 [英] make zero appear last in a list of ascending numbers

问题描述

我在 Android 应用程序中使用 SQLite.
在我的所有表中，我都有一个索引为 0 的默认行，用于保存该表的默认值.
在大多数情况下，每个字段的默认数字为 0，这是最适合使用的数字.
但是，当我使用 ORDER BY 语句对数据进行排序时，我希望将所有零值字段放在列表的末尾，因为它们通常为空并使用默认信息.
在 where 语句中排除这些字段是不可接受的，因为我正在尝试对信息进行排序，而不是对其进行过滤.

I'm using SQLite in an Android application.
In all of my tables I have a default row with an index of 0 that holds default values for that table.
In most situations the default number for each field is 0 and that is the best number to use.
However, when I sort my data using an ORDER BY statement I want to have all of my zero value fields put at the end of the list as they're generally empty and using default information.
Excluding these fields in a where statement is unacceptable as I'm trying to sort information, not filter it.

这是我目前所拥有的:

select distinct item.name, epoch_date.epoch
from epoch_date, time
where (time.begin_date_id = epoch_date._id)
and (item.time_id = time._id)
order by epoch_date.epoch;

在我的沙箱数据库中，这会返回如下内容:

In my sandbox database, this returns something like:

"item 1", 0
"item 2", 0
"item 4", 0
.
.
.
"item 3",  1275350400
"item 42", 1275472800
"item 12", 1275472800

但我想要的是:

"item 3",  1275350400
"item 42", 1275472800
"item 12", 1275476400
.
.
.
"item 1", 0
"item 2", 0
"item 4", 0

推荐答案

等同于 CASE 语句建议，但更短:

Equivalent to the CASE statement suggestion, but shorter:

 ORDER BY epoch_date.epoch == 0, epoch_date.epoch

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