Ordering以特定方式选择子句结果

问题描述

我需要帮助编写选择子句查询。

I need help with writing a select clause query.

例如，我有一个像这样的查询：

For example, lets say I have a query like that:

select value from some_table order by value asc;

因此我得到：

1
2
3
4
5
6
7
8
9
10

但是我想写的特殊查询给我排序的值，但会在 8 之后输入 5 。

but a special query I want to write, is the one which still will give me sorted values, but will put 5 after 8.

我需要一个值来退出常规顺序。

this means I need one value to be out of regular order.

它可以用其他方式描述。让我说我有两组数字（例子）：
A = {a | 1 和我需要所有这些值排序像A，78，B

it can be described in other way. lets say I have two groups of numbers (example):A={ a | 1<=a<=118, a!=78 } B={ b | b>118 }I have a group C=A U B U {78}and I need all these values sorted like "A,78,B"

推荐答案

假设值为整数，可以这样做：

Assuming value is integer, you could do this:

SELECT *
  FROM tbl
ORDER BY
       CASE
         WHEN value = 5 THEN 8.5
         ELSE value
       END

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