SQL-生成具有特定格式的字母数字字符串

我需要了解如何生成一个字母数字字符串，该字符串的格式与我当前使用的答案中的格式相同，但必须采用以下格式：

元音+辅音+元音+辅音+4位数

例如ABAB1111或IJUZ9236

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谢谢你的建议。

我想你想要一个随机字符串。像这样的方法应该会奏效：

with v as (
      select 'A' as c union all select 'E' union all . . . 
     ),
     c as (
      select 'B' as c union all select 'C' union all . . .
     ),
     d as (
      select '0' as c union all select '1' union all . . .
     )
select ((select top 1 c from v order by newid()) +
        (select top 1 c from c order by newid()) +
        (select top 1 c from v order by newid()) +
        (select top 1 c from c order by newid()) +
        (select top 1 c from d order by newid()) +
        (select top 1 c from d order by newid()) +
        (select top 1 c from d order by newid()) +
        (select top 1 c from d order by newid())
       );

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您可以按照以下步骤操作：

生成一个元音a，E。。。表，辅音B，C。。表和编号1,2，。。桌子

然后使用此查询：

SELECT  (SELECT TOP 1 * FROM vowels ORDER BY newid()) +
        (SELECT TOP 1 * FROM consonants ORDER BY newid()) +
        (SELECT TOP 1 * FROM vowels ORDER BY newid()) +
        (SELECT TOP 1 * FROM consonants ORDER BY newid()) +
        (SELECT TOP 1 * FROM numbers ORDER BY newid()) +
        (SELECT TOP 1 * FROM numbers ORDER BY newid()) +
        (SELECT TOP 1 * FROM numbers ORDER BY newid()) +
        (SELECT TOP 1 * FROM numbers ORDER BY newid()) 

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使用临时表作为示例数据，我会这样做

CREATE TABLE #Vowels (Vowel varchar(1))
INSERT INTO #Vowels VALUES ('A'),('E'),('I'),('O'),('U')

CREATE TABLE #Consonants (Consonant varchar(1))
INSERT INTO #Consonants VALUES ('B'),('C'),('D'),('F'),('G'),('H'),('J'),('K'),('L'),('M'),('N'),('P'),('Q'),('R'),('S'),('T'),('V'),('W'),('X'),('Y'),('Z')

CREATE TABLE #Numbers (Numbers varchar(1))
INSERT INTO #Numbers VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9)

SELECT
v1.Vowel + c1.Consonant + v2.Vowel + c2.Consonant + n1.Numbers + n2.Numbers + n3.Numbers + n4.Numbers AS Result

FROM (SELECT TOP 1 Vowel FROM #Vowels ORDER BY NEWID()) v1
CROSS JOIN (SELECT TOP 1 Consonant FROM #Consonants ORDER BY NEWID()) c1
CROSS JOIN (SELECT TOP 1 Vowel FROM #Vowels ORDER BY NEWID()) v2
CROSS JOIN (SELECT TOP 1 Consonant FROM #Consonants ORDER BY NEWID()) c2
CROSS JOIN (SELECT TOP 1 Numbers FROM #Numbers ORDER BY NEWID()) n1
CROSS JOIN (SELECT TOP 1 Numbers FROM #Numbers ORDER BY NEWID()) n2
CROSS JOIN (SELECT TOP 1 Numbers FROM #Numbers ORDER BY NEWID()) n3
CROSS JOIN (SELECT TOP 1 Numbers FROM #Numbers ORDER BY NEWID()) n4

DROP TABLE #Consonants
DROP TABLE #Numbers
DROP TABLE #Vowels

结果是这样的，但每次运行时都有不同的值

Result
AQOF7641

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如果您多次运行此功能，则可以制作包含元音、辅音和数字的适当表格。这将降低此查询的成本。

这应该可以做到：

WITH letters as
(
  SELECT 'bcdfghjklmnpqrstvwxyz' c, 'aeiou' v
)
,CTE as
(
  SELECT
    SUBSTRING(v, CAST(rand()*5 as int)+1, 1)+
    SUBSTRING(c, CAST(rand()*21 as int)+1, 1)+
    SUBSTRING(v, CAST(rand()*5 as int)+1, 1)+
    SUBSTRING(c, CAST(rand()*21 as int)+1, 1)+
    right(10000+ CAST(rand()*10000 as int),4) x
  FROM letters
)
SELECT x
FROM CTE

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你的问题仍然不清楚。为什么你要用ABAB生成序列……为什么不用其他东西生成序列。它什么时候会改变？嗨，谢谢你的回答，我现在使用它，它可以作为一个查询，但是当我尝试用它作为存储过程和标量值函数时，它会抛出语法错误，即使没有出现红线。我这里有一个截图：@Alycus。在每条语句的末尾加上分号。

DECLARE @AlphaString VARCHAR(200) = NULL;

WITH
    CTE_Digits AS (
    SELECT TOP 255
        ROW_NUMBER() OVER (ORDER BY a.object_id) AS RowNum
    FROM
        sys.all_columns a
    CROSS JOIN
        sys.all_columns b),
    CTE_Types AS (
    SELECT
        CHAR(RowNum) AS Digit,
        CASE
            WHEN RowNum < 58 THEN 'D'
            WHEN CHAR(RowNum) IN ('A','E','I','O','U') THEN 'V'
            ELSE 'C'
        END AS CharType
    FROM
        CTE_Digits
    WHERE
        RowNum BETWEEN 48 AND 57
        OR RowNum BETWEEN 65 AND 90),
    CTE_List AS (
    SELECT
        *,
        ROW_NUMBER() OVER (PARTITION BY CharType ORDER BY NEWID()) AS NewRow
    FROM
        CTE_Types),
    CTE_Ordered AS (
    SELECT
        *,
        CASE CharType
            WHEN 'V' THEN 2
            WHEN 'C' THEN 3
            WHEN 'D' THEN 7
        END * NewRow AS DigitOrder
    FROM
        CTE_List
    WHERE
        (NewRow < 5
        AND CharType = 'D')
        OR NewRow < 3)
SELECT @AlphaString = 
(SELECT
    CAST(Digit AS VARCHAR(MAX))
FROM
    CTE_Ordered
ORDER BY
    DigitOrder
FOR XML PATH(''));

SELECT @AlphaString;