如何在SQL Server中编写一个函数来输出单词中的数字？
输入：1
输出：一个
答案 0 :(得分：1)
考虑使用辅助数字表。
注意：此MS SQL
创建一个序列表 - 这可能包括您需要的所有数字或至少高达999。 我限制它至少，但它增加了额外的逻辑。
CREATE TABLE [dbo].[Sequence]
(
seq INTEGER NOT NULL UNIQUE,
word [varchar](25) NOT NULL
)
INSERT INTO [Sequence] SELECT 0, ''
INSERT INTO [Sequence] SELECT 1, 'One'
INSERT INTO [Sequence] SELECT 2, 'Two'
INSERT INTO [Sequence] SELECT 3, 'Three'
INSERT INTO [Sequence] SELECT 4, 'Four'
INSERT INTO [Sequence] SELECT 5, 'Five'
INSERT INTO [Sequence] SELECT 6, 'Six'
INSERT INTO [Sequence] SELECT 7, 'Seven'
INSERT INTO [Sequence] SELECT 8, 'Eight'
INSERT INTO [Sequence] SELECT 9, 'Nine'
INSERT INTO [Sequence] SELECT 10, 'Ten'
INSERT INTO [Sequence] SELECT 11, 'Eleven'
INSERT INTO [Sequence] SELECT 12, 'Twelve'
INSERT INTO [Sequence] SELECT 13, 'Thirteen'
INSERT INTO [Sequence] SELECT 14, 'Fourteen'
INSERT INTO [Sequence] SELECT 15, 'Fifteen'
INSERT INTO [Sequence] SELECT 16, 'Sixteen'
INSERT INTO [Sequence] SELECT 17, 'Seventeen'
INSERT INTO [Sequence] SELECT 18, 'Eighteen'
INSERT INTO [Sequence] SELECT 19, 'Nineteen'
INSERT INTO [Sequence] SELECT 20, 'Twenty'
INSERT INTO [Sequence] SELECT 30, 'Thirty'
INSERT INTO [Sequence] SELECT 40, 'Forty'
INSERT INTO [Sequence] SELECT 50, 'Fifty'
INSERT INTO [Sequence] SELECT 60, 'Sixty'
INSERT INTO [Sequence] SELECT 70, 'Seventy'
INSERT INTO [Sequence] SELECT 80, 'Eighty'
INSERT INTO [Sequence] SELECT 90, 'Ninty'
然后创建用户定义的函数。
CREATE FUNCTION dbo.udf_NumToWords (
@num AS INTEGER
) RETURNS VARCHAR(50)
AS
BEGIN
DECLARE @words AS VARCHAR(50)
IF @num = 0 SELECT @words = 'Zero'
ELSE IF @num < 20 SELECT @words = word FROM sequence WHERE seq = @num
ELSE IF @num < 100 (SELECT @words = TTens.word + ' ' + TUnits.word
FROM Sequence AS TUnits
CROSS JOIN Sequence AS TTens
WHERE TUnits.seq = (@num % 100) % 10
AND TTens.seq = (@num % 100) - (@num % 100) % 10
)
ELSE IF @num = 100 (SELECT @words = THundreds.word + ' Hundred'
FROM Sequence AS THundreds
WHERE THundreds.seq = (@num / 100)
)
ELSE IF @num < 1000 (
SELECT @words = THundreds.word + ' Hundred and '
+ TTens.word + ' ' + TUnits.word
FROM Sequence AS TUnits
CROSS JOIN Sequence AS TTens
CROSS JOIN Sequence AS THundreds
WHERE TUnits.seq = (@num % 100) % 10
AND TTens.seq = (@num % 100) - (@num % 100) % 10
AND THundreds.seq = (@num / 100)
)
ELSE IF @num = 1000 (SELECT @words = TThousand.word + ' Thousand'
FROM Sequence AS TThousand
WHERE TThousand.seq = (@num / 1000)
)
ELSE IF @num < 10000 (
SELECT @words = TThousand.word + ' Thousand '
+ THundreds.word + ' Hundred and '
+ TTens.word + ' ' + TUnits.word
FROM Sequence AS TUnits
CROSS JOIN Sequence AS TTens
CROSS JOIN Sequence AS THundreds
CROSS JOIN Sequence AS TThousand
WHERE TUnits.seq = (@num % 100) % 10
AND TTens.seq = (@num % 100) - (@num % 100) % 10
AND THundreds.seq = (@num / 100) - (@num / 1000) * 10
AND TThousand.seq = (@num / 1000)
)
ELSE SELECT @words = STR(@num)
RETURN @words
END
现在测试功能：
SELECT NumberAsWords = dbo.udf_NumToWords(888);
答案 1 :(得分：1)
这是对Andrew的上述答案的略微修改（对安德鲁的所有信用）但这将在不使用任何函数的情况下返回sql查询中的结果
WITH Sequence
AS (
SELECT 0 seq
,'' word
UNION ALL
SELECT 1
,'One'
UNION ALL
SELECT 2
,'Two'
UNION ALL
SELECT 3
,'Three'
UNION ALL
SELECT 4
,'Four'
UNION ALL
SELECT 5
,'Five'
UNION ALL
SELECT 6
,'Six'
UNION ALL
SELECT 7
,'Seven'
UNION ALL
SELECT 8
,'Eight'
UNION ALL
SELECT 9
,'Nine'
UNION ALL
SELECT 10
,'Ten'
UNION ALL
SELECT 11
,'Eleven'
UNION ALL
SELECT 12
,'Twelve'
UNION ALL
SELECT 13
,'Thirteen'
UNION ALL
SELECT 14
,'Fourteen'
UNION ALL
SELECT 15
,'Fifteen'
UNION ALL
SELECT 16
,'Sixteen'
UNION ALL
SELECT 17
,'Seventeen'
UNION ALL
SELECT 18
,'Eighteen'
UNION ALL
SELECT 19
,'Nineteen'
UNION ALL
SELECT 20
,'Twenty'
UNION ALL
SELECT 30
,'Thirty'
UNION ALL
SELECT 40
,'Forty'
UNION ALL
SELECT 50
,'Fifty'
UNION ALL
SELECT 60
,'Sixty'
UNION ALL
SELECT 70
,'Seventy'
UNION ALL
SELECT 80
,'Eighty'
UNION ALL
SELECT 90
,'Ninty'
)
,CTENumbers
AS (
SELECT 0 AS num --changezero to your starting number
UNION ALL
SELECT num + 1
FROM CTENumbers
WHERE num + 1 <= 255 --change 255 to upper limit
)
SELECT *
,CASE
WHEN num = 0
THEN 'Zero'
WHEN num < 20
THEN (
SELECT word
FROM sequence
WHERE seq = num
)
WHEN num < 100
THEN (
SELECT TTens.word + ' ' + TUnits.word
FROM Sequence AS TUnits
CROSS JOIN Sequence AS TTens
WHERE TUnits.seq = (num % 100) % 10
AND TTens.seq = (num % 100) - (num % 100) % 10
)
WHEN num < 1000
THEN (
SELECT THundreds.word + ' Hundred and ' + TTens.word + ' ' + TUnits.word
FROM Sequence AS TUnits
CROSS JOIN Sequence AS TTens
CROSS JOIN Sequence AS THundreds
WHERE TUnits.seq = (num % 100) % 10
AND TTens.seq = (num % 100) - (num % 100) % 10
AND THundreds.seq = (num / 100)
)
WHEN num = 1000
THEN (
SELECT TThousand.word + ' Thousand'
FROM Sequence AS TThousand
WHERE TThousand.seq = (num / 1000)
)
WHEN num < 10000
THEN (
SELECT TThousand.word + ' Thousand ' + THundreds.word + ' Hundred and ' + TTens.word + ' ' + TUnits.word
FROM Sequence AS TUnits
CROSS JOIN Sequence AS TTens
CROSS JOIN Sequence AS THundreds
CROSS JOIN Sequence AS TThousand
WHERE TUnits.seq = (num % 100) % 10
AND TTens.seq = (num % 100) - (num % 100) % 10
AND THundreds.seq = (num / 100) - (num / 1000) * 10
AND TThousand.seq = (num / 1000)
)
ELSE STR(num)
END Number
FROM CTENumbers
OPTION (MAXRECURSION 10000)
答案 2 :(得分：0)
如果它可以帮助任何人，你可以创建一个数字表并使用像c＃这样的服务器端语言来填充它。您还可以使用Humanizer库将数字转换为单词;它还支持本地化。
CREATE TABLE [Numbers](
[n] [bigint] NOT NULL,
[InWords] [nvarchar](50) NULL,
)
var db = new MyDbContext();
for (int i = 1; i < 1000; i++)
{
db.Database.ExecuteSqlCommand($"INSERT INTO Numbers (n, InWords) VALUES({i}, '{i.ToWords()}')");
}