如何应用非标准 SQL 列排序顺序?

How to apply non standard SQL column sort order?(如何应用非标准 SQL 列排序顺序?)

问题描述

考虑下面名为 Persons 的表格:

Consider the following table named Persons:

Key Name    Type    Date        Pack
1   Pocoyo  KIND    30-11-2011  1
2   Erik    MAN     10-10-1980  1
3   Alinda  VROUW   12-12-1991  1
4   Pingu   KIND    11-12-2012  1
5   Elisia  KIND    11-11-2010  1
6   Kees    MAN     10-11-1984  2

现在我想按Pack、Type 和Date 对这个表进行排序，但我想要Type 要像 MAN、VROUW、KIND 一样排序，所以基本上想要的结果应该是:

Now I would like to sort this table on Pack, Type and Date, but I would like the Type to be sorted like MAN, VROUW, KIND, so basically the desired outcome should be like:

Key Name    Type    Date        Pack
2   Erik    MAN     10-10-1980  1
3   Alinda  VROUW   12-12-1991  1
5   Elisia  KIND    11-11-2010  1
1   Pocoyo  KIND    30-11-2011  1
4   Pingu   KIND    11-12-2012  1
6   Kees    MAN     10-11-1984  2

如何创建此查询?

推荐答案

试用

SELECT * 
FROM Persons
ORDER BY
    Pack,
    CASE Type
        WHEN 'MAN' THEN 1
        WHEN 'VROUW' THEN 2
        WHEN 'KIND' THEN 3
    END,
    Date ASC

MSDN:案例 (Transact-SQL)

CASE 可用于任何允许有效的语句或子句中表达.例如，您可以在语句中使用 CASE，例如SELECT、UPDATE、DELETE 和 SET，以及在 select_list 等子句中，IN、WHERE、ORDER BY 和 HAVING.

CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING.

这篇关于如何应用非标准 SQL 列排序顺序?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！