Oracle SQL：用于从固定格式的字符串化 map 中找出值的正则表达式

Question

我的表的特定列中有一个字符串，它具有某种固定格式。

例如：

Score breakup: {TR_SCORE=0, SAR_SCORE=2, LO_SCORE=2, CASH_SCORE=1, TPP_SCORE=1, CREDITS_SCORE=1}

我希望编写一个正则表达式来分离出所有评分值，如下所示：

SELECT TR_SCORE, SAR_SCORE, LO_SCORE 
  FROM some_table 
 WHERE message LIKE 'Score breakup:%';

TR_SCORE	SAR_SCORE	LO_SCORE
0	2	3
1	3	0

任何人都可以帮助创建一个正则表达式吗？

Answer 1

您可以使用REGEXP_REPLACE() function 和\d+模式来提取仅包含数字的子字符串，例如

SELECT col,
       REGEXP_REPLACE(col,'(.*TR_SCORE=)(\d+)(.*)','\2') AS tr_score,
       REGEXP_REPLACE(col,'(.*SAR_SCORE=)(\d+)(.*)','\2') AS sar_score,
       REGEXP_REPLACE(col,'(.*LO_SCORE=)(\d+)(.*)','\2') AS lo_score
  FROM t

演示