MySQL ORDER BY CASE不工作

Question

我想按照匹配节，细分和关键映射的顺序来整理我的结果。现在我得到了错误，但是我认为我正处在正确的轨道上来完成这个任务。我无法弄清楚如何正确设置我的情况下按照这个顺序。

编辑：

我已经更新了其运作的查询，但它仍然没有按照正确的顺序排序。

SELECT 
    list.WorkOrder, 
    list.Address, 
    locateparsed.CrossStreet, 
    list.Section, 
    list.Subdivision, 
    locateparsed.KeyMap, 
    locateparsed.City, 
    list.Score 
FROM list 
LEFT JOIN locateparsed ON locateparsed.WorkOrder = list.WorkOrder 
    WHERE locateparsed.City = "PEARLAND" 
    AND list.Completed = 0 
    AND list.Reference = 0 
    AND locateparsed.Ticket IS NOT NULL 
GROUP BY list.WorkOrder 
ORDER BY CASE 
    WHEN list.Section = 'Sec. 1' THEN 1 
    WHEN list.Subdivision = 'Shadow Ridge' THEN 2 
    WHEN locateparsed.KeyMap = '612P' THEN 3 
END 

输出例：

WO | Address | CrossStreet | Section | Subdivision | KeyMap | City 
1 | 123 test | other | Sec. 1 | Shadow Ridge | 612P | Pearland 
2 | 111 test | other | Sec. 1 | Shadow Ridge | 612P | Pearland 
3 | 333 other | bleach | Sec. 2 | Shadow Ridge | 612P | Pearland 
4 | 334 other | bleach | Sec. 2 | Shadow Ridge | 612P | Pearland 
5 | 848 other | bleach | Sec. 2 | Shadow Ridge | 612P | Pearland 
6 | 733 blah | random | Sec. 5 | Bright Ridge | 612P | Pearland 
7 | 722 hmm | blah | Sec. 5 | Bright Ridge | 612P | Pearland 
8 | 723 hmm | blah | Sec. 5 | Bright Ridge | 612P | Pearland 
9 | 111 asdf | fdas | Sec. 30 | Other Ridge | 650P | Pearland 
10 | 123 asdf | fdas | Sec. 30 | Other Ridge | 650P | Pearland 

Answer 1

你的语法是错误的。它应该是：

ORDER BY CASE 
    WHEN list.Section = 'Sec. 1' THEN 1 
    WHEN list.Subdivision = 'Shadow Ridge' THEN 2 
    WHEN locateparsed.KeyMap = '612P' THEN 3 
    ELSE 4 -- anything that doesn't match above conditions comes last 
END 

这里有一个END整个CASE表达，每个WHEN后没有了，WHEN子句之间没有逗号。