mysql5.7或excel中提取文字

如何把A列变成B列的效果
一共差不多有5000多行

求求大神解答一下

mysql 中定义一个函数，提取字段中的汉字。

DELIMITER $$
DROP FUNCTION IF EXISTS `Num_char_extract`$$
CREATE FUNCTION `Num_char_extract`(Varstring VARCHAR(100)CHARSET utf8, flag INT) RETURNS VARCHAR(50) CHARSET utf8
BEGIN
    DECLARE len INT DEFAULT 0;
    DECLARE Tmp VARCHAR(100) DEFAULT '';
    SET len=CHAR_LENGTH(Varstring);
    IF flag = 0 
    THEN
        WHILE len > 0 DO
        IF MID(Varstring,len,1)REGEXP'[0-9]' THEN
        SET Tmp=CONCAT(Tmp,MID(Varstring,len,1));
        END IF;
        SET len = len - 1;
        END WHILE;
    ELSEIF flag=1
    THEN
        WHILE len > 0 DO
        IF (MID(Varstring,len,1)REGEXP '[a-zA-Z]') 
        THEN
        SET Tmp=CONCAT(Tmp,MID(Varstring,len,1));
        END IF;
        SET len = len - 1;
        END WHILE;
    ELSEIF flag=2
    THEN
        WHILE len > 0 DO
        IF ( (MID(Varstring,len,1)REGEXP'[0-9]')
        OR (MID(Varstring,len,1)REGEXP '[a-zA-Z]') ) 
        THEN
        SET Tmp=CONCAT(Tmp,MID(Varstring,len,1));
        END IF;
        SET len = len - 1;
        END WHILE;
    ELSEIF flag=3
    THEN
        WHILE len > 0 DO
        IF NOT (MID(Varstring,len,1)REGEXP '^[u0391-uFFE5]')
        THEN
        SET Tmp=CONCAT(Tmp,MID(Varstring,len,1));
        END IF;
        SET len = len - 1;
        END WHILE;
    ELSE 
        SET Tmp = 'Error: The second paramter should be in (0,1,2,3)';
        RETURN Tmp;
    END IF;
    RETURN REVERSE(Tmp);
    END$$
DELIMITER ;

使用方式 标识 0 提取数字 1 提取字母 2提取数字+字母 3 提取汉字

select Num_char_extract('字段',标识)