假设在SQL操作中，字符串分割操作的行顺序。

在SQL操作中，字符串分割操作可以使用内置的字符串函数来实现。具体的行顺序取决于具体的数据库管理系统（DBMS）。

以下是在常见的DBMS中实现字符串分割操作的示例代码：

1. MySQL:

SET @str = 'apple,banana,orange';
SET @delimiter = ',';

SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(@str, @delimiter, numbers.n), @delimiter, -1) AS value
FROM
  (SELECT 1 AS n UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5) AS numbers
WHERE
  n <= 1 + (LENGTH(@str) - LENGTH(REPLACE(@str, @delimiter, '')));

2. SQL Server:

DECLARE @str VARCHAR(MAX) = 'apple,banana,orange';
DECLARE @delimiter CHAR(1) = ',';

WITH Split(str, start, pos, end) AS
(
  SELECT @str, 1, CHARINDEX(@delimiter, @str), LEN(@str)
  UNION ALL
  SELECT str, pos + 1, CHARINDEX(@delimiter, str, pos + 1), end
  FROM Split
  WHERE pos > 0
)
SELECT SUBSTRING(str, start, CASE WHEN pos > 0 THEN pos - start ELSE end - start + 1 END) AS value
FROM Split;

3. Oracle:

SELECT SUBSTR(str, start_pos, end_pos - start_pos) AS value
FROM
  (SELECT @str AS str, LEVEL AS start_pos,
    INSTR(@str, @delimiter, 1, LEVEL) AS end_pos
  FROM DUAL
    CONNECT BY INSTR(@str, @delimiter, 1, LEVEL - 1) > 0);

上述代码示例中，字符串分割操作的行顺序取决于具体的DBMS，并且可以根据需要进行调整。