Question

我需要将列值拆分为多行，列值不会分层，只是文本。每行不得超过一定数量的字符。

我的桌子只有一栏。

               Value 
       This is the text for test.

现在我希望在一行中有多行的最大长度为5个字符的上述值。

ID    Value 
 1    This        (this row has a white space in the end)
 2    is the
 3     text       (this row has a white space in the beginning)
 4    for t
 5    est.        (this row has only 4 character but not more than5 )

Answer 1

一种方法是使用递归CTE：

with cte as (
      select left(col, 5) as char5, substring(col, 6, len(col)) as rest
      from table t
      union all
      select left(rest, 5), substring(rest, 6, len(rest))
      from cte
      where len(rest) > 0
     )
select char5
from cte;

请注意，SQL Server中存在最大递归深度。如果字符串非常长，您可以覆盖默认值。

将列值拆分为多行

1 个答案: