替换 0 个或多个 html 个标签内的文本

Question

我有一个 table，其中有一列包含 varchar2 字符串，如下所示。

My dog chases my cat
<p>My dog ate my other cat</p>
<p><div id="abcd">My cat ate my hamster</div><p>
<p><b><div id="abcd">My hamster sleeps all the time</div></b></p>

我需要对 html 标签内的文本进行 SUBSTR。

我认为编号组是可行的方法，但我无法将结束标记放入自己的组中。这是 sql 我有：


WITH sentences AS 
(
SELECT 1 as nr, 'My dog chases my cat' AS ln FROM DUAL
UNION
SELECT 2, '<p>My dog ate my other cat</p>' FROM DUAL
UNION
SELECT 3,'<p><x><div id="abcd">My cat ate my hamster</div></x></p>' FROM DUAL
UNION
SELECT 4,'<p><b><div id="abcd">My hamster sleeps all the time</div></b></p>' FROM DUAL
)
SELECT nr, regexp_replace(ln, '^((<[^>]+>)+)(.*)((<[^>]+>)+)$', 'group 1:,group 2:,group 3:,group 4:', 1, 1, 'n')
FROM sentences order by nr;

RETURNS

1   My dog chases my cat
2   group 1:<p>,group 2:<p>,group 3:My dog ate my other cat,group 4:</p>
3   group 1:<p><x><div id="abcd">,group 2:<div id="abcd">,group 3:My cat ate my hamster</div></x>,group 4:</p>
4   group 1:<p><b><div id="abcd">,group 2:<div id="abcd">,group 3:My hamster sleeps all the time</div></b>,group 4:</p>

第 4 组仅包含一个结束标签，其他结束标签 is/are 在第 3 组中，如第 3 行和第 4 行所示。我需要什么模式才能让所有结束标签都有自己的编号组 ?

Answer 1

虽然说过不要这样做，但对于这些特定值，您实际上只有一个字符：

WITH sentences AS 
(
SELECT 1 as nr, 'My dog chases my cat' AS ln FROM DUAL
UNION
SELECT 2, '<p>My dog ate my other cat</p>' FROM DUAL
UNION
SELECT 3,'<p><x><div id="abcd">My cat ate my hamster</div></x></p>' FROM DUAL
UNION
SELECT 4,'<p><b><div id="abcd">My hamster sleeps all the time</div></b></p>' FROM DUAL
)
SELECT nr,
  regexp_replace(ln, '^((<[^>]+>)+)(.*?)((<[^>]+>)+)$', 'group 1:,group 2:,group 3:,group 4:', 1, 1, 'n') as str
--------------------------------------^
FROM sentences order by nr;

没有 ? 使 .* 非贪婪，您将在第三组中包括较早的结束标签，并且只有最后的结束标签进入第 4 组，因为它有到.

NR STR                                                                                                                     
-- ------------------------------------------------------------------------------------------------------------------------
 1 My dog chases my cat                                                                                                    
 2 group 1:<p>,group 2:<p>,group 3:My dog ate my other cat,group 4:</p>                                                    
 3 group 1:<p><x><div id="abcd">,group 2:<div id="abcd">,group 3:My cat ate my hamster,group 4:</div></x></p>              
 4 group 1:<p><b><div id="abcd">,group 2:<div id="abcd">,group 3:My hamster sleeps all the time,group 4:</div></b></p>

或者只是那个组：

SELECT nr, regexp_replace(ln, '^((<[^>]+>)+)(.*?)((<[^>]+>)+)$', '', 1, 1, 'n') as str
FROM sentences order by nr;

NR STR                           
-- ------------------------------
 1 My dog chases my cat          
 2 My dog ate my other cat       
 3 My cat ate my hamster         
 4 My hamster sleeps all the time

替换 0 个或多个 html 个标签内的文本

Replace the text within 0 or more html tags

regex

sql

oracle

regexp-replace