所以我在这里看了几个不同的例子,但是它们似乎都不适合我。
以下是我需要分类的示例:
Alpha #1
Beta #3
Charlie #2
Alpha #2
Charlie #1
Beta #2
Beta #1
Alpha #10
如果排序我想
Alpha #1
Alpha #2
Alpha #10
Beta #1
Beta #2
Beta #3
Charlie #1
Charlie #2
但是,当我使用以下查询时,Alpha #10
未遵循所需规则。
ORDER BY
Case When IsNumeric(LEFT(MachineName,1)) = 1
Then CASE When IsNumeric(MachineName) = 1
Then Right(Replicate('0',20) + MachineName + '0', 20)
Else Right(Replicate('0',20) + MachineName, 20)
END
When IsNumeric(LEFT(MachineName,1)) = 0
Then Left(MachineName + Replicate('',21), 20)
End
我得到了这个:
Alpha #1
Alpha #10
Alpha #2
...
我是LEFT
和RIGHT
的新手,所以我可能会做错事,所以任何指导都会非常感激!
答案 0 :(得分:2)
DECLARE @t TABLE(v VARCHAR(100))
INSERT INTO @t VALUES
('Alpha #1'),
('Beta #3'),
('Charlie #2'),
('Alpha #2'),
('Charlie #1'),
('Beta #2'),
('Beta #1'),
('Alpha #10'),
('Alpha #')
SELECT * FROM @t
ORDER BY CASE WHEN PATINDEX('%[0-9]%', v) > 1 THEN SUBSTRING(v, 1, PATINDEX('%[0-9]%', v) - 1) END,
CASE WHEN PATINDEX('%[0-9]%', v) > 1 THEN CAST(SUBSTRING(v, PATINDEX('%[0-9]%', v), LEN(v)) AS INT) END
输出:
Alpha #
Alpha #1
Alpha #2
Alpha #10
Beta #1
Beta #2
Beta #3
Charlie #1
Charlie #2