SQL Server 2012：从字符串中提取SO＃

Question

我试图从SQL Server中的字符串中取出SO＃而不使用UDF。例如：

this is the SO#12345 55 
this is the SO12345 55 
this is the SO 12345 55 
this is the SO#12345/55 

无论特殊字符和空格如何，我只想抓取12345。

Answer 1

DECLARE @Table1 TABLE 
    (VAL varchar(23)) 
; 

INSERT INTO @Table1 
    (VAL) 
VALUES 
    ('this is the SO#12345 55'), 
    ('this is the SO12345 55'), 
    ('this is the SO 12345 55'), 
    ('this is the SO#12345/55') 
; 


SELECT LEFT(subsrt, PATINDEX('%[^0-9]%', subsrt + 't') - 1) 
FROM (
    SELECT subsrt = SUBSTRING(val, pos, LEN(val)) 
    FROM (
     SELECT val, pos = PATINDEX('%[0-9]%', val) 
     FROM @Table1 
    ) d 
) t