从MySQL中的字符串中删除数字 [英] Removing numbers from string in mysql

问题描述

我有一个像"FALL01"这样的字符串，我必须从这样的字符串中删除数字，因此输出应类似于Fall，spring之类.请让我知道如何使用sql query删除数字.以下是我的示例表.谢谢

I have a string like "FALL01" and i have to remove number from such string so output should look like Fall , spring and the like. Kindly let me know how can i remove number with sql query . Following is my sample table. Thanks

Season
------
FALL01
FALL05
Spring01
Summer06

推荐答案

我建议您为此手动创建一个User Define Function.这是一个很棒的教程，您可以使用

I suggest the you manually create a User Define Function for this. Here's a great tutorial that you can use

• 从字符串中提取数字

代码段:

DELIMITER $$ 

DROP FUNCTION IF EXISTS `uExtractNumberFromString`$$
CREATE FUNCTION `uExtractNumberFromString`(in_string varchar(50)) 
RETURNS INT
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,sChar);
            ELSE
               SET finNumber=CONCAT(finNumber,'');
            END IF;
            SET inti=inti+1;
        END WHILE;
        RETURN CAST(finNumber AS SIGNED INTEGER) ;
    ELSE
        RETURN 0;
    END IF;

END$$

DELIMITER ;

创建函数后，您现在可以轻松地从字符串中删除数字，例如

once the function has been created, you can now easily remove the numbers from string, example

SELECT uExtractNumberFromString(Season)
FROM   TableName

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