用 PLSQL 中的 REGEXP_REPLACE 替换所有实例答案

【问题标题】：Replace all instances with REGEXP_REPLACE in PLSQL用 PLSQL 中的 REGEXP_REPLACE 替换所有实例
【发布时间】：2015-06-11 11:01:01
【问题描述】：

我一直在尝试使用 PLSQL 中的 REGEXP_REPLACE 替换给定字符串中关键字 POSTPONE 周围的所有文本。

如果有两个 POSTPONE 音符彼此相邻，则仅替换第一个实例。

下面是我一直在研究的例子

CROWHURA_POSTPONE_26/03/2015_Postpone_1 30/03/2015 00:00:00~CAMERONR_POSTPONE_30/03/2015_Postpone_1 04/04/2015 00:00:00~CAMERONR_NOTES_30/03/2015_waiting on sr results~CHINGD_POSTPONE_04/04/2015_Postpone_1 07/04/2015 00:00:00

我只想要与 __NOTE_ 相关的文本

#CAMERONR_NOTES_30/03/2015_waiting on sr results#

我一直在使用的 REGEXP 是这样的：

REGEXP_REPLACE(q.comments,'(~|^).{0,10}_POSTPONE_.{1,42}(~|$)','# ')

任何帮助将不胜感激。

编辑：更多示例，替换需要适用于：对于每一个，我想要任何和所有_note_相关的文本

VANHOOYJ_NOTES_27/03/2015_Site switching out ~VANHOOYJ_POSTPONE_27/03/2015_Postpone_1 03/04/2015 00:00:00
FABISHD_POSTPONE_31/03/2015_Postpone_1 06/04/2015 00:00:00
FABISHD_NOTES_31/03/2015_GE enquiry~FABISHD_POSTPONE_31/03/2015_Postpone_1 06/04/2015 00:00:00
CAMERONR_NOTES_31/03/2015_booked sr ~CAMERONR_POSTPONE_31/03/2015_Postpone_1 05/04/2015 00:00:00
FABISHD_POSTPONE_01/04/2015_Postpone_1 06/04/2015 00:00:00
CHINGD_POSTPONE_01/04/2015_Postpone_1 03/04/2015 00:00:00~CHINGD_POSTPONE_04/04/2015_Postpone_1 07/04/2015 00:00:00
FABISHD_NOTES_31/03/2015_GE enquiry~FABISHD_POSTPONE_31/03/2015_Postpone_1 06/04/2015 00:00:00
CHINGD_NOTES_01/04/2015_waiting on switching~CHINGD_POSTPONE_01/04/2015_Postpone_1 06/04/2015 00:00:00
FABISHD_NOTES_19/03/2015_Needs to be completed by switching~FABISHD_POSTPONE_19/03/2015_Postpone_1 26/03/2015 00:00:00~FABISHD_NOTES_26/03/2015_Switching~FABISHD_POSTPONE_26/03/2015_Postpone_1 30/03/2015 00:00:00~CHINGD_POSTPONE_30/03/2015_Postpone_1 06/04/2015 00:00:00
CHINGD_NOTES_27/03/2015_GEN2360163 to confirm read~CHINGD_POSTPONE_27/03/2015_Postpone_1 01/04/2015 00:00:00~CHINGD_POSTPONE_29/03/2015_Postpone_1 02/04/2015 00:00:00~CHINGD_POSTPONE_04/04/2015_Postpone_1 07/04/2015 00:00:00
CHINGD_POSTPONE_29/03/2015_Postpone_1 02/04/2015 00:00:00~CHINGD_POSTPONE_04/04/2015_Postpone_1 07/04/2015 00:00:00
CHINGD_NOTES_01/04/2015_waiting on switching~CHINGD_POSTPONE_01/04/2015_Postpone_1 06/04/2015 00:00:00
FABISHD_NOTES_30/03/2015_Unsure where to credit units to.~FABISHD_POSTPONE_30/03/2015_Postpone_1 31/03/2015 00:00:00~CAMERONR_POSTPONE_31/03/2015_Postpone_1 05/04/2015 00:00:00

【问题讨论】：

适合您吗？ sqlfiddle.com/#!4/9eecb/3139
是的，谢谢，这适用于该示例。我添加了其他示例，这也需要适用。
当没有_notes_ 相关？
Null 最好。但是，当前的 SQL 将这些字段保留为 #，这对我的目的来说很好。
当有两次你想要然后 2 或只是第一次？

标签： regex plsql

【解决方案1】：

SQL Fiddle

**查询**：

select val,
regexp_replace(val, '(~?([^~]+_NOTES_[^~]+)~?)|(.)','#\2#') x,  --keeps the notes part and replaces everything esle with #
regexp_replace(regexp_replace(val, '(~?([^~]+_NOTES_[^~]+)~?)|(.)','#\2#'),'#{2,}','#') y  --removes consecutive #s
from
test t

Results：

|                                                                                                                                                                                                                                     VAL |                                                                                                                                                                                                                                                                                                                                                                                                                      X |                                                                                                Y |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|
|                                                                                                                                                                      VANHOOYJ_NOTES_27/03/2015_Site switching out ~VANHOOYJ_POSTPONE_27 |                                                                                                                                                                                                                                                                                         #VANHOOYJ_NOTES_27/03/2015_Site switching out ################################################################################ |                                                  #VANHOOYJ_NOTES_27/03/2015_Site switching out # |
|                                                                                                                                                                                                                     FABISHD_POSTPONE_31 |                                                                                                                                                                                                                                                                                                                                          ############################################################################# |                                                                                                # |
|                                                                                                                                                                                 FABISHD_NOTES_31/03/2015_GE enquiry~FABISHD_POSTPONE_31 |                                                                                                                                                                                                                                                                                                     #FABISHD_NOTES_31/03/2015_GE enquiry############################################################################## |                                                            #FABISHD_NOTES_31/03/2015_GE enquiry# |
|                                                                                                                                                                               CAMERONR_NOTES_31/03/2015_booked sr ~CAMERONR_POSTPONE_31 |                                                                                                                                                                                                                                                                                                  #CAMERONR_NOTES_31/03/2015_booked sr ################################################################################ |                                                           #CAMERONR_NOTES_31/03/2015_booked sr # |
|                                                                                                                                                                                                                     FABISHD_POSTPONE_01 |                                                                                                                                                                                                                                                                                                                                          ############################################################################# |                                                                                                # |
|                                                                                                                                                            CHINGD_POSTPONE_01/04/2015_Postpone_1 03/04/2015 00:00:00~CHINGD_POSTPONE_04 |                                                                                                                                                                                                                        ############################################################################################################################################################################################### |                                                                                                # |
|                                                                                                                                                                                 FABISHD_NOTES_31/03/2015_GE enquiry~FABISHD_POSTPONE_31 |                                                                                                                                                                                                                                                                                                     #FABISHD_NOTES_31/03/2015_GE enquiry############################################################################## |                                                            #FABISHD_NOTES_31/03/2015_GE enquiry# |
|                                                                                                                                                                         CHINGD_NOTES_01/04/2015_waiting on switching~CHINGD_POSTPONE_01 |                                                                                                                                                                                                                                                                                              #CHINGD_NOTES_01/04/2015_waiting on switching############################################################################ |                                                   #CHINGD_NOTES_01/04/2015_waiting on switching# |
| FABISHD_NOTES_19/03/2015_Needs to be completed by switching~FABISHD_POSTPONE_19/03/2015_Postpone_1 26/03/2015 00:00:00~FABISHD_NOTES_26/03/2015_Switching~FABISHD_POSTPONE_26/03/2015_Postpone_1 30/03/2015 00:00:00~CHINGD_POSTPONE_30 | #FABISHD_NOTES_19/03/2015_Needs to be completed by switching######################################################################################################################FABISHD_NOTES_26/03/2015_Switching################################################################################################################################################################################################## | #FABISHD_NOTES_19/03/2015_Needs to be completed by switching#FABISHD_NOTES_26/03/2015_Switching# |
|                                               CHINGD_NOTES_27/03/2015_GEN2360163 to confirm read~CHINGD_POSTPONE_27/03/2015_Postpone_1 01/04/2015 00:00:00~CHINGD_POSTPONE_29/03/2015_Postpone_1 02/04/2015 00:00:00~CHINGD_POSTPONE_04 |                                                #CHINGD_NOTES_27/03/2015_GEN2360163 to confirm read#################################################################################################################################################################################################################################################################################################################### |                                             #CHINGD_NOTES_27/03/2015_GEN2360163 to confirm read# |
|                                                                                                                                                            CHINGD_POSTPONE_29/03/2015_Postpone_1 02/04/2015 00:00:00~CHINGD_POSTPONE_04 |                                                                                                                                                                                                                        ############################################################################################################################################################################################### |                                                                                                # |
|                                                                                                                                                                         CHINGD_NOTES_01/04/2015_waiting on switching~CHINGD_POSTPONE_01 |                                                                                                                                                                                                                                                                                              #CHINGD_NOTES_01/04/2015_waiting on switching############################################################################ |                                                   #CHINGD_NOTES_01/04/2015_waiting on switching# |
|                                                                                               FABISHD_NOTES_30/03/2015_Unsure where to credit units to.~FABISHD_POSTPONE_30/03/2015_Postpone_1 31/03/2015 00:00:00~CAMERONR_POSTPONE_31 |                                                                                                                                                       #FABISHD_NOTES_30/03/2015_Unsure where to credit units to.###################################################################################################################################################################################################### |                                      #FABISHD_NOTES_30/03/2015_Unsure where to credit units to.# |

感谢 @Jorge Campos 提供的 sqlfiddle。

【讨论】：