Question

我正在寻找一个正则表达式或者其中的东西：

------------------------
| id  |   prop_name    |
------------------------
|  1  |  isThisAnExample |
------------------------

对此：

-----------------------------
| id  |   prop_name         |
-----------------------------
|  1  |  Is This An Example |
-----------------------------

当然，如果第一个字符是大写字母，并且其他单词以小写字母开头，那将会很酷。但只有分裂他们也没关系。

Answer 1

也许这是你正在寻找的正则表达式

＆＃34;在每个小写字符之间插入一个空格，后跟一个大写字符＆＃34;：

func application(application: UIApplication,
                 openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
    var options: [String: AnyObject] = [UIApplicationOpenURLOptionsSourceApplicationKey: sourceApplication!,UIApplicationOpenURLOptionsAnnotationKey: annotation]
    return GIDSignIn.sharedInstance().handleURL(url,
                                                sourceApplication: sourceApplication,
                                                annotation: annotation)
}

第一个字符可以简单地用大写字母替换

select regexp_replace('IsThisAnExample', '([[:lower:]])([[:upper:]])', '\1 \2') from dual

因此，首先替换结果的第一个字符和regexp_replace：

select upper(substr('isThisAn Example', 1,1))||substr('isThisAn Example', 2) from dual;

如果只有句子的第一个字符应为大写字母，请尝试：

select regexp_replace(upper(substr('isThisAn Example', 1,1))||substr('isThisAn Example', 2), '([[:lower:]])([[:upper:]])', '\1 \2') from dual;

Answer 2

最好使用正则表达式，但无论如何：

SELECT listagg(splitted, '') within GROUP (ORDER BY lvl) FROM( 
    SELECT LEVEL lvl, CASE WHEN SUBSTR(your_string, LEVEL, 1) = 
                    UPPER(SUBSTR(your_string, LEVEL, 1)) 
        THEN ' ' || SUBSTR(your_string, LEVEL, 1) ELSE 
                    SUBSTR(your_string, LEVEL, 1)  END splitted
FROM (SELECT 'isThisAnExample' your_string FROM dual) 
CONNECT BY LEVEL <= LENGTH(your_string) );

Answer 3

与Frank的解决方案类似，但更简单（尽可能减少正则表达式的使用）：

with
     input ( str ) as (
       select 'isThisAnExample' from dual
     )
select upper(substr(str, 1, 1)) ||
       lower(regexp_replace(substr(str, 2), '(^|[[:lower:]])([[:upper:]])', '\1 \2'))
          as modified_str
from   input;

MODIFIED_STR
------------------
Is this an example

1 row selected.

按大写Oracle分割

3 个答案: