我在使用包含注释的字符串(varchar(4000))的列值时正在寻找一些建议。我必须基于日期执行提取,但是除了字符串中的时间戳,我没有其他时间戳。我需要提取过去6个月内创建的所有评论。我一直在玩regexp_SUBSTR,regexp_INSTR,但是由于10g的限制,我无法使用regexp_count,这使生活变得很困难。
字符串看起来像这样;
LOCKED ENTITY: ACCOUNT
LOCKED BY USER: ops
LOCKED AT: 31/05/2004 11:47
CUST NOTES: <Please enter explanation here>
Customer notes are entered here.
UNLOCKED ENTITY: ACCOUNT
UNLOCKED BY USER: ops
UNLOCKED AT: 31/05/2004 11:49
UNLOCK NOTES: <Please enter explanation here>
Test
LOCKED ENTITY: USER
LOCKED BY USER: ops
LOCKED AT: 31/05/2004 11:50
LOCK NOTES: <Please enter explanation here>
Test
UNLOCKED ENTITY: USER
UNLOCKED BY USER: ops
UNLOCKED AT: 24/08/2009 16:47
UNLOCKED NOTES: <Please enter explanation here>
谢谢您标记了这些数据块,但是我需要单独提取上面的所有“块”,因此基本上具有一个ID和4条记录。 ID是此表的另一列。
我的问题是,尽管上面的示例显示了4个块,但我可能拥有更多或更少的块,但没有确定的数字可使用。我尝试使用CONNECT BY和REGECP_COUNT来运行所有事件,但没有结果,regexp_count是11g起。
理想情况下,我想得到的是这样的东西;
ID ENTITY ACTION DATE LOCK_NOTES
------- ------------------------------- -------------------------- ----------------------------- ---------------------------------------------------------------------
11652907 LOCKED ENTITY: ACCOUNT LOCKED BY USER: OPS LOCKED AT: 11/06/2004 09:11 LOCK NOTES: ACCT Locked
11652907 LOCKED ENTITY: USER LOCKED BY USER: OPS LOCKED AT: 11/06/2004 09:58 LOCK NOTES: User Locked
11652907 UNLOCKED ENTITY: USER UNLOCKED BY USER: OPS UNLOCKED AT: 11/06/2004 20:05 UNLOCK NOTES: User now aware.
然后我将能够基于日期进行查询并提取相关记录。
任何帮助将不胜感激。
谢谢。
[您可以使用regexp_substr(str,'^.*+$',1,level,'m')
提取每一行以及level
结构中的select..connect by level
伪装确定行号,并按每六行分组:
with tab as
(
select regexp_substr(str,'^.*+$',1,level,'m') as str, level as rn
from tab0
connect by level <= instr(str,chr(10))+1
)
select max(case when mod(rn,6)=1 then str end) as "ENTITY",
max(case when mod(rn,6)=2 then str end) as "ACTION",
max(case when mod(rn,6)=3 then str end) as "DATE",
max(case when mod(rn,6)=4 then str end) as "LOCK_NOTES"
from tab
group by ceil(rn/6);
其中Chr(10)
是换行符