-- 创建一个函数

DELIMITER $$

DROP FUNCTION IF EXISTS `uExtractNumberFromString`$$

CREATE FUNCTION `uExtractNumberFromString`(in_string VARCHAR(50))

RETURNS VARCHAR(50) CHARSET utf8

NO SQL

BEGIN

DECLARE ctrNumber VARCHAR(50);

DECLARE finNumber VARCHAR(50) DEFAULT ' ';

DECLARE sChar VARCHAR(2);

DECLARE inti INTEGER DEFAULT 1;

IF LENGTH(in_string) > 0 THEN

WHILE(inti <= LENGTH(in_string)) DO

SET sChar= SUBSTRING(in_string,inti,1);

SET ctrNumber= FIND_IN_SET(sChar,'0,1,2,3,4,5,6,7,8,9');

IF ctrNumber > 0 THEN

SET finNumber=CONCAT(finNumber,'');

ELSE

SET finNumber=CONCAT(finNumber,sChar);

END IF;

SET inti=inti+1;

END WHILE;

RETURN  finNumber;

ELSE

RETURN 0;

END IF;

END$$

DELIMITER ;

调用函数

SELECT uExtractNumberFromString(字段) FROM `表名`;