Question

我尝试使用Oracle SQL使用REGEXP_SUBSTR从clob中提取多个字符串。

clob_field示例：

xxx xxx"xxxxxxxYY=1234xxxxx.xxxx.xxxx"xx       xxxxxxxxxxxxxx  
xxxxx"xxxxxxxYY=2345xxxxx.xxxxx.xxxxxxxxxxxx"xxxx  xxxxxxxxxx  
xxx  xxxxx"xxxxxxxxxxxxxxYY=34567xxxxx.xxx.xxxxx"xxxxxxxxxxxx  
xxxx"xxxxxYY=4567xx.xxxxxx"xxxxxxxxxx   xxxxxxxxxxx  xxxxxxxx

我试过了：

select a.id, regexp_substr(b.clob_field,'YY=',",[^"]+"') "clob_result"  
from table1 a, table2 b  
where a.id = b.id

加入查询示例的所需结果是：

id       clob_result  
1        xxxxxxxYY=1234xxxxx.xxxx.xxxx  
1        xxxxxxxYY=2345xxxxx.xxxxx.xxxxxxxxxxxx  
1        xxxxxxxxxxxxxxYY=34567xxxxx.xxx.xxxxx  
1        xxxxxYY=4567xx.xxxxxx

不清楚如何搜索包含＆＃39; YY =＆＃39;的字符串，并返回用＆＃34;引用的整个字符串;在开始和结束。

非常感谢任何帮助！

Answer 1

select 
  regexp_substr(string,'"([^"]*YY=[^"]*)"', 1, 1, '', 1) as clob_result
from your_table

fiddle

  select 
    id, occ,
    regexp_substr(string,'"([^"]*YY=[^"]*)"', 1, occ, '', 1) as clob_result
  from your_table,
       (select level occ from dual connect by level < 99)
  where occ <= regexp_count(string,'"([^"]*YY=[^"]*)"')
  order by id, occ

fiddle

Answer 2

您可以使用REGEXP_REPLACE获取多个出现以及周围的双引号。然后，您可以使用TRIM / REPLACE删除它们。

SQL Fiddle

with x(y) as (
    select 'xxxx"xxxxxxxYY=1234xxxxx.xxxx.xxxx"xx       xxxxx' from dual union all 
    select 'xx"xxxxxxxYY=2345xxxxx.xxxxx.xxxxxxxxxxxx"xxx xxx' from dual union all 
    select 'xxx"xxxxxxxxxxxxYY=34567xxxxx.xxx.xxxxx"xxxxxxxxx' from dual union all 
    select 'x"xxxxxYY=4567xx.xxxxxx"xx"xxxxxYY=8787xx.xxxx"xx' from dual
    )
select y, replace(trim('"' from regexp_replace(y,
                                               '("[^"]*YY=[^"]*")|(.)',
                                               '\1'
                                              )  -- this will remove anything that is not matched by the regex
                      ),
                  '""',
                  ','
                 ) as clob_result
from x

<强> Results ：

|                                                 Y |                               CLOB_RESULT |
|---------------------------------------------------|-------------------------------------------|
| xxxx"xxxxxxxYY=1234xxxxx.xxxx.xxxx"xx       xxxxx |             xxxxxxxYY=1234xxxxx.xxxx.xxxx |
| xx"xxxxxxxYY=2345xxxxx.xxxxx.xxxxxxxxxxxx"xxx xxx |    xxxxxxxYY=2345xxxxx.xxxxx.xxxxxxxxxxxx |
| xxx"xxxxxxxxxxxxYY=34567xxxxx.xxx.xxxxx"xxxxxxxxx |       xxxxxxxxxxxxYY=34567xxxxx.xxx.xxxxx |
| x"xxxxxYY=4567xx.xxxxxx"xx"xxxxxYY=8787xx.xxxx"xx | xxxxxYY=4567xx.xxxxxx,xxxxxYY=8787xx.xxxx |

SQL Clob在Clob中使用join搜索多个字符串，可能是REGEXP_SUBSTR

2 个答案: