MySQL提取字符串中的数字

 1 -- 方法1
 2 select  replace(reverse(FORMAT(reverse('国械注准20173463309'), 0)), ',', '');
 3 
 4 -- 方法2
 5 CREATE FUNCTION get_number (param varchar(50))
 6 
 7 RETURNS varchar(30)
 8 
 9 BEGIN
10 DECLARE length INT DEFAULT 0;
11 
12 DECLARE temp_str varchar(50) default '';
13 
14 set length=CHAR_LENGTH(param);
15 
16 WHILE length > 0 DO
17 
18 IF (ASCII(mid(param,length,1))>47 and ASCII(mid(param,length,1))<58 )THEN
19 
20 set temp_str = concat(temp_str,mid(param,length,1));
21 
22 END IF;
23 
24 SET length = length - 1;
25 
26 END WHILE;
27 
28 RETURN REVERSE(temp_str);
29 
30 END;
31 
32 
33 select get_number('国械注准20173463309');