在处理字符串时需要更加小心。你不能使用 REPLACE() 因此，如果逗号分隔列表中的一个元素是另一个元素的子字符串，将替换多个引用，从而损坏数据。这个 INSERT() 字符串函数更适合于此，不要与 INSERT 用于插入到表中的语句。

DELIMITER $$

DROP PROCEDURE IF EXISTS `insert_csv` $$
CREATE PROCEDURE `insert_csv`(_list MEDIUMTEXT)
BEGIN

DECLARE _next TEXT DEFAULT NULL;
DECLARE _nextlen INT DEFAULT NULL;
DECLARE _value TEXT DEFAULT NULL;

iterator:
LOOP
  -- exit the loop if the list seems empty or was null;
  -- this extra caution is necessary to avoid an endless loop in the proc.
  IF CHAR_LENGTH(TRIM(_list)) = 0 OR _list IS NULL THEN
    LEAVE iterator;
  END IF;

  -- capture the next value from the list
  SET _next = SUBSTRING_INDEX(_list,',',1);

  -- save the length of the captured value; we will need to remove this
  -- many characters + 1 from the beginning of the string 
  -- before the next iteration
  SET _nextlen = CHAR_LENGTH(_next);

  -- trim the value of leading and trailing spaces, in case of sloppy CSV strings
  SET _value = TRIM(_next);

  -- insert the extracted value into the target table
  INSERT INTO t1 (c1) VALUES (_value);

  -- rewrite the original string using the `INSERT()` string function,
  -- args are original string, start position, how many characters to remove, 
  -- and what to "insert" in their place (in this case, we "insert"
  -- an empty string, which removes _nextlen + 1 characters)
  SET _list = INSERT(_list,1,_nextlen + 1,'');
END LOOP;

END $$

DELIMITER ;

接下来是一个测试表：

CREATE TABLE `t1` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `c1` varchar(64) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

新表为空。

mysql> SELECT * FROM t1;
Empty set (0.00 sec)

调用程序。

mysql> CALL insert_csv('foo,bar,buzz,fizz');
Query OK, 1 row affected (0.00 sec)

请注意，“1行受影响”并不意味着您所期望的。它指的是我们做的最后一次插入。因为我们一次插入一行，所以如果过程至少插入一行，那么行计数总是1；如果该过程不插入任何内容，则0行将受到影响。
有效吗？

mysql> SELECT * FROM t1;
+----+------+
| id | c1   |
+----+------+
|  1 | foo  |
|  2 | bar  |
|  3 | buzz |
|  4 | fizz |
+----+------+
4 rows in set (0.00 sec)