sql - 如何仅将记录从字母数字更新为数字？

Question

主题：数据清理 - 检查异常值 - 不正常

我正在尝试将 custID 从值“A123”更新为“123”，将“22A4”更新为“224”我只想将整数保留在 custID 中，我不希望 custID 包含任何非整数字符（A 到 Z 和a 到 z)

CREATE TABLE customer (
custID VARCHAR2(10) PRIMARY KEY,
custName VARCHAR2(30)
);
INSERT INTO customer(custID,custName) VALUES ('A123','Angel');
INSERT INTO customer(custID,custName) VALUES ('22A4','Chris');
INSERT INTO customer(custID,custName) VALUES ('2333','Chris');

UPDATE customer
SET custID =            -- I want to change 'A123' to '123', '22A4' to '224'
WHERE         ;

Answer 1

用这个...

UPDATE customer
SET custID = REGEXP_REPLACE(custID, '[^0-9]+', '')
WHERE         ;

或试试这个...

UPDATE customer
SET custID = REGEXP_REPLACE(custID, '[^[:digit:]]+', '')
WHERE         ;

Answer 2

UPDATE customer SET custid = REGEXP_SUBSTR ( custid , '[0-9]*' ) WHERE

REGEXP_SUBSTR Oracle 文档