Question

我的一张桌子有这样的值..

Year 1
Year 9
Year 4
Kindy [can be any word without numbers]
Pre-School [can be any word without numbers]
Year 8
Year 22
Year 15....

我如何首先按字母顺序选择Them，然后按照数字顺序选择这样的..

Kindy [can be any word without numbers]
Pre-School [can be any word without numbers]
Year 1
Year 4
Year 8
Year 9
Year 15
Year 22

在这种情况下，我无法提取整数和顺序，因为有些年份没有它...

更新

我的答案 - 不和的意思

SELECT  YearLevel FROM Student 
ORDER BY 
CASE WHEN YearLevel NOT LIKE '%[0-9]%' THEN 0
ELSE CAST(RIGHT(YearLevel, LEN(YearLevel) - 5) AS int)
END

Answer 1

在ORDER BY子句中尝试此操作：

ORDER BY
CASE WHEN col = 'Kindy' then 0
WHEN col = 'Pre-School' then 1
ELSE CAST(SUBSTRING(col,6,LEN(col)) AS INT) + 1
END

Answer 2

首先，您必须为获取字符串的文本部分和数字部分创建以下函数：

CREATE FUNCTION [dbo].[GetNumbersFromText](@String varchar(2000))
RETURNS INT 
AS BEGIN
    DECLARE @Count INT = 0,
            @IntNumbers VARCHAR(1000) = '',
            @FindNumber BIT = 0

    WHILE @Count <= LEN(@String) BEGIN

        IF SUBSTRING(@String,@Count,1) >= '0' AND SUBSTRING(@String,@Count,1) <= '9' BEGIN
            SET @IntNumbers = @IntNumbers + SUBSTRING(@String,@Count,1)
            SET @FindNumber = 1
        END ELSE IF (@FindNumber = 1) BEGIN
            BREAK
        END
        SET @Count = @Count + 1
    END
    RETURN CAST(@IntNumbers AS INT)
END



CREATE FUNCTION [dbo].[GetTextPartOfText](@String varchar(2000))
RETURNS INT 
AS BEGIN
    DECLARE @Count INT = 0,
            @Text VARCHAR(1000) = '',           

    WHILE @Count <= LEN(@String) BEGIN

        IF SUBSTRING(@String,@Count,1) >= '0' AND SUBSTRING(@String,@Count,1) <= '9' BEGIN
            BREAK
        END ELSE BEGIN
            SET @Text = @Text + SUBSTRING(@String,@Count,1)
        END
        SET @Count = @Count + 1
    END
    RETURN @Text
END

在第二步中，您使用以下查询进行排序：

SELECT * 
FROM YourTable
ORDER BY [dbo].[GetTextPartOfText](TextColumn),[dbo].[GetNumbersFromText](TextColumn), TextColumn

Answer 3

SELECT YearLevel FROM student
GROUP BY YearLevel 
ORDER BY 
    (CASE 
        WHEN YearLevel LIKE 'Year%'
        THEN 'Year' + CONVERT(varchar,LEN(YearLevel)) + YearLevel
        ELSE YearLevel
    END)

SQL Server按部分字符串顺序排序

3 个答案: