删除特殊字符SQL

Question

I have column in a table which contains special characters with an attached string. The same column contains numbers also. I am only intresed in extracting numbers out of that column eg

Name-3445 => 3445; Out-90 => 90; 786  => 786

How would i do this in SQL or PL/SQL?

Answer 1

SELECT regexp_replace(some_column, '[^0-9]*', '') as clean_value
FROM your_table

Answer 2

REGEXP_REPLACE(<Your_String>,'[^[:alnum:]'' '']', NULL)

Example:

SELECT REGEXP_REPLACE('##$$$123&&!!__!','[^[:alnum:]'' '']', NULL) FROM dual;

Output:

123

Answer 3

您可以使用regexp_substr函数： http ://docs.oracle.com/cd/B14117_01/server.101/b10759/functions116.htm

Answer 4

PL/SQL has a REGEX_REPLACE function, which you could use to replace anything that isn't a digit with an empty string. Details on REGEX_REPLACE can be found here: http://psoug.org/reference/regexp.html

Answer 5

Without knowing the integrity of your data, something like this might do what you're asking:

select CAST(SUBSTRING(_COLUMNNAME_,CHARINDEX('-', _COLUMNNAME_),1000), Integer) as ColumnName
from tblTable where _COLUMNNAME_ like '%-%'
union all select CAST(_COLUMNNAME, Integer) as ColumnName
from tblTable where _COLUMNNAME_ not like '%-%'