如何按數字順序對字母數字SQL Server NVARCHAR列進行排序？

Question

我有以下SQL：

SELECT fldTitle 
FROM tblTrafficAlerts 
ORDER BY fldTitle

它按以下順序返回結果（來自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

您會看到M23和M25列在M3和M4行的上方，這看起來並不令人滿意，如果掃描更長的結果列表，您不希望按此順序讀取它們。

因此，我希望結果按字母順序排序，然后按數字排序，看起來像：

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出現在M23和M25之上。

Answer 1

這應該處理它。 還添加了一些奇怪的數據，以確保訂單也適用於：

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'),'')

結果：

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

也許這不是很美，但確實有效：

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));

這將在第一個數字之前提取所有內容，按順序提取，然后將該數字和順序提取為整數。

這是輸出：

╔══════════════════════════════════════════════════════════════════╗
║                             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

我會這樣：

編輯：我把它分成兩個部分：主要字母和第二部分。 這允許你 - 如果需要 - 以數字方式處理第二部分（但第一行中有一個令人不安的“M”......）

只做第二步會更容易：在第一個空白處剪切，檢查長度並在需要時在排序上添加“0”。

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

結果：

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