我正在尝试从行中提取数字。

我正在 Oracle 11G 中尝试此操作

CREATE TABLE test1
(
COL_NAME VARCHAR2(100)
);


insert into test1 values ('DWH_SCHEMA_BI.AB_25_BC_ORDER_STATUS');


select COL_NAME,REGEXP_REPLACE(COL_NAME,'^([A-Z0-9$]{17,})_.*','\17') as BEGINNING from TEST1
and COL_NAME='DWH_SCHEMA_BI.AB_25_BC_ORDER_STATUS'

现有结果

COL_NAME                             BEGINNING
DWH_SCHEMA_BI.AB_25_BC_ORDER_STATUS  DWH_SCHEMA_BI.AB_25_BC_ORDER_STATUS

预期结果

COL_NAME                             BEGINNING
DWH_SCHEMA_BI.AB_25_BC_ORDER_STATUS  25

总模式

DWH_SCHEMA_BI.AB_25_BC_ORDER_STATUS
DWH_SCHEMA.ABC_02_BC_ORDER_STATUS
DWH_BID.ABC_11_BC_ORDER_STATUS

请注意，我总共有 3 种模式，如何达到预期的结果，似乎我的 REGEXP 逻辑无法按照预期的结果运行

https://dbfiddle.uk/?rdbms=oracle_11.2&fiddle=8aafffde010ae586f8a79974ee1ff140