正则 - 提取子串

 11g版本：

WITH t AS
(
  SELECT '(( :1 * :1 ) + :2 )/:10' col
  FROM dual
  UNION ALL
  SELECT '(( :3 * :0 ) + :323 )/:1213lse12lj' FROM dual
)
SELECT col,
       regexp_substr(col,
                     '[0-9]+',
                     1,
                     LEVEL) AS dd,
       LEVEL AS position
FROM t
CONNECT BY LEVEL <= regexp_count(col,
                                 '[0-9]+') AND
           PRIOR dbms_random.VALUE IS NOT NULL AND
           PRIOR col = col
ORDER SIBLINGS BY col;

 10g版本：

 

WITH t AS
(
  SELECT '(( :1 * :1 ) + :2 )/:10' col
  FROM dual
  UNION ALL
  SELECT '(( :3 * :0 ) + :323 )/:1213lse12lj' FROM dual
)
SELECT col,
       regexp_substr(col,
                     '[0-9]+',
                     1,
                     LEVEL) AS dd,
       LEVEL AS position
FROM t
CONNECT BY LEVEL <= (length(regexp_replace(col,
                                           '[0-9]+',
                                           '~~~')) -
           length(REPLACE(regexp_replace(col,
                                                   '[0-9]+',
                                                   '~~~'),
                                    '~~~'))) / 3 AND
           PRIOR dbms_random.VALUE IS NOT NULL AND
           PRIOR col = col
ORDER SIBLINGS BY col;