GSUB与Postgres

Question

我如何编辑下面的备忘录，以便在第一组数字后删除QPC CANCEL以及以下字母和数字？

输入：

Memo field: QPC CANCEL 861518069 CONV. TO Test Receipt 1430
Memo field: QPC CANCEL 8615315362 Another test transaction
Memo field: QPC CANCEL 86151343 Our third test transaction

输出：

Memo field: 861518069
Memo field: 8615315362
Memo field: 86151343

Answer 1

with t(col) as(
values
('Memo field: QPC CANCEL 861518069 CONV. TO Test Receipt 1430'),
('Memo field: QPC CANCEL 8615315362 Another test transaction'),
('Memo field: QPC CANCEL 86151343 Our third test transaction')
)

select substring(col from 'QPC CANCEL\s*(\d+)' ) from t