更新时间:2023-02-26 09:11:42
尝试这些方法.
这将获得您最初要求的第一个元素:
This gets the first element as you originally asked for:
SQL> with tbl(str) as (
select 'Hello My Delimiter World' from dual
)
SELECT REGEXP_SUBSTR( str ,'(.*?)( My Delimiter |$)', 1, 1, NULL, 1 ) AS element
FROM tbl;
ELEME
-----
Hello
此版本解析整个字符串.添加了NULL元素以显示它可用于缺少的元素:
This version parses the whole string. NULL elements added to show it works with missing elements:
SQL> with tbl(str) as (
select ' My Delimiter Hello My Delimiter World My Delimiter My Delimiter test My Delimiter ' from dual
)
SELECT LEVEL AS element,
REGEXP_SUBSTR( str ,'(.*?)( My Delimiter |$)', 1, LEVEL, NULL, 1 ) AS element_value
FROM tbl
CONNECT BY LEVEL <= regexp_count(str, ' My Delimiter ')+1;
ELEMENT ELEMENT_VALUE
---------- --------------------
1
2 Hello
3 World
4
5 test
6
6 rows selected.