Question

我有以下SQL：

SELECT fldTitle 
FROM tblTrafficAlerts 
ORDER BY fldTitle

按以下顺序返回结果（来自NVARCHAR列）：

A1M northbound within J17 Congestion
M1 J19 southbound exit Congestion
M1 southbound between J2 and J1 Congestion
M23 northbound between J8 and J7 Congestion
M25 anti-clockwise between J13 and J12 Congestion
M25 clockwise between J8 and J9 Broken down vehicle
M3 eastbound at the Fleet services between J5 and J4A Congestion
M4 J19 westbound exit Congestion

您会看到M23和M25列在M3和M4行的上方，这看起来并不令人满意，如果扫描更长的结果列表，您也不会期望按此顺序阅读。

因此，我希望结果按字母顺序排序，然后按数字排序，看起来像：

A1M northbound within J17 Congestion
M1 J19 southbound exit Congestion
M1 southbound between J2 and J1 Congestion
M3 eastbound at the Fleet services between J5 and J4A Congestion
M4 J19 westbound exit Congestion
M23 northbound between J8 and J7 Congestion
M25 anti-clockwise between J13 and J12 Congestion
M25 clockwise between J8 and J9 Broken down vehicle

因此M3和M4出现在M23和M25之上。

Answer 1

这应该处理它。还添加了一些奇怪的数据，以确保订单也适用于：

SELECT x
FROM 
(values
('A1M northbound within J17 Congestion'),
('M1 J19 southbound exit Congestion'),
('M1 southbound between J2 and J1 Congestion'),
('M23 northbound between J8 and J7 Congestion'),
('M25 anti-clockwise between J13 and J12 Congestion'),
('M25 clockwise between J8 and J9 Broken down vehicle'),
('M3 eastbound at the Fleet services between J5 and J4A Congestion'),
('M4 J19 westbound exit Congestion'),('x'), ('2'), ('x2')) x(x)
ORDER BY
  LEFT(x, patindex('%_[0-9]%', x +'0')), 
  0 + STUFF(LEFT(x, 
  PATINDEX('%[0-9][^0-9]%', x + 'x1x')),1,
  PATINDEX('%_[0-9]%', x + '0'),'')

结果：

2
A1M northbound within J17 Congestion
M1 J19 southbound exit Congestion
M1 southbound between J2 and J1 Congestion
M3 eastbound at the Fleet services between J5 and J4A Congestion
M4 J19 westbound exit Congestion
M23 northbound between J8 and J7 Congestion
M25 anti-clockwise between J13 and J12 Congestion
M25 clockwise between J8 and J9 Broken down vehicle
x
x2

Answer 2

也许这不是很美，但确实有效：

DECLARE @tblTrafficAlerts  TABLE
(
    fldTitle NVARCHAR(500)
);

INSERT INTO @tblTrafficAlerts  (fldTitle)
VALUES (N'A1M northbound within J17 Congestion')
    , (N'M1 J19 southbound exit Congestion')
    , (N'M1 southbound between J2 and J1 Congestion')
    , (N'M23 northbound between J8 and J7 Congestion')
    , (N'M25 anti-clockwise between J13 and J12 Congestion')
    , (N'M25 clockwise between J8 and J9 Broken down vehicle')
    , (N'M3 eastbound at the Fleet services between J5 and J4A Congestion')
    , (N'M4 J19 westbound exit Congestion');

SELECT *
FROM @tblTrafficAlerts AS T
CROSS APPLY (SELECT PATINDEX('%[0-9]%', T.fldTitle)) AS N(NumIndex)
CROSS APPLY (SELECT PATINDEX('%[0-9][^0-9]%', T.fldTitle)) AS NN(NextLetter)
ORDER BY SUBSTRING(T.fldTitle, 0, N.NumIndex), CONVERT(INT, SUBSTRING(T.fldTitle, N.NumIndex, NN.NextLetter - 1));

这将提取第一个数字之前的所有内容，按顺序排序，然后将该数字和顺序提取为整数。

那是输出：

╔══════════════════════════════════════════════════════════════════╗
║                             fldTitle                             ║
╠══════════════════════════════════════════════════════════════════╣
║ A1M northbound within J17 Congestion                             ║
║ M1 J19 southbound exit Congestion                                ║
║ M1 southbound between J2 and J1 Congestion                       ║
║ M3 eastbound at the Fleet services between J5 and J4A Congestion ║
║ M4 J19 westbound exit Congestion                                 ║
║ M23 northbound between J8 and J7 Congestion                      ║
║ M25 anti-clockwise between J13 and J12 Congestion                ║
║ M25 clockwise between J8 and J9 Broken down vehicle              ║
╚══════════════════════════════════════════════════════════════════╝

Answer 3

SELECT fldTitle FROM tblTrafficAlerts order by LEFT(fldTitle , CHARINDEX(' ', fldTitle) - 1), fldTitle

或使用patindex

ORDER BY LEFT(Col1,PATINDEX('%[^0-9]%',Col1)-1)

Answer 4

我是这样的：

编辑：我把它分成两个部分：主要字母和第二部分。这允许你 - 如果需要 - 用数字处理第二部分（但是第一行中有一个令人不安的＆＃34; M＆＃34;）

只做第二步会更容易：剪切第一个空白，检查长度并添加一个＆＃39; 0＆＃39;如果需要，可以进行分类。

DECLARE @tblTrafficAlerts TABLE(fldTitle VARCHAR(500));

INSERT INTO @tblTrafficAlerts VALUES 
 ('A1M northbound within J17 Congestion')
,('M1 J19 southbound exit Congestion')
,('M1 southbound between J2 and J1 Congestion')
,('M23 northbound between J8 and J7 Congestion')
,('M25 anti-clockwise between J13 and J12 Congestion')
,('M25 clockwise between J8 and J9 Broken down vehicle')
,('M3 eastbound at the Fleet services between J5 and J4A Congestion')
,('M4 J19 westbound exit Congestion');

SELECT ta.fldTitle
      ,Leading.Letter
      ,Leading.SecondPart
FROM @tblTrafficAlerts AS ta
CROSS APPLY(SELECT SUBSTRING(ta.fldTitle,1,1) AS Letter
                  ,SUBSTRING(ta.fldTitle,2,CHARINDEX(' ',ta.fldTitle)-1) AS SecondPart) AS Leading
ORDER BY Leading.Letter,CASE WHEN LEN(Leading.SecondPart)=1 THEN Leading.SecondPart + '0' ELSE Leading.SecondPart END

结果：

fldTitle                                                           Letter   SecondPart
A1M northbound within J17 Congestion                               A        1M 
M1 J19 southbound exit Congestion                                  M        1 
M1 southbound between J2 and J1 Congestion                         M        1 
M23 northbound between J8 and J7 Congestion                        M        23 
M25 anti-clockwise between J13 and J12 Congestion                  M        25 
M25 clockwise between J8 and J9 Broken down vehicle                M        25 
M3 eastbound at the Fleet services between J5 and J4A Congestion   M        3 
M4 J19 westbound exit Congestion                                   M        4

如何按数字顺序对字母数字SQL Server NVARCHAR列进行排序？

4 个答案: