Question

我有一个列，其中包含我需要拆分为三个单独列的信息。我知道我需要使用SUBSTRING功能，但老实说我会如何处理它。有人能提供一些见解吗？以下是返回的当前列：

| Change                                                 |
----------------------------------------------------------
| changed status from "new" to "in progress"             |
| changed ORT status from "in progress" to "Code Review" |
| changed MileStone from "1.1" to "1.2"                  |

以下是我需要返回结果的方法：

| ChangeType              |  ChangeFrom  |   ChangeTo  |
-----------------------------------------------------
| changed status from     | new          | in progress |
| changed ORT status from | in progress  | Code Review |
| changed MileStone from  | 1.1          | 1.2         |

提前谢谢！

Answer 1

这应该有用，假设单词to和select left(change, chardinex(' from ', change) + 5) as changeType, replace(substring(change, charindex(' from ', change) + 5, charindex(' to ', change) - charindex(' from ', change) - 5 ), '"', '') as ChangeFrom, replace(right(change, charindex(' ot ', reverse(change)), '"', '') as changeTo不会出现在字符串的其他位置：

        ...
        create new application pool
        ...
        sman.CommitChanges();
        int i = 0;
        const int max = 10;
        do
        {
            i++;
            try
            {
                if (ObjectState.Stopped == pool.State)
                {
                    write_log("Pool was stopped, starting: " + pool.Name);
                    pool.Start();
                }
                sman.CommitChanges();
                break;
            }
            catch (System.Runtime.InteropServices.COMException e)
            {
                if (i < max)
                {
                    write_log("Waiting for IIS to activate new config...");
                    Thread.Sleep(1000);
                }
                else
                {
                    throw new Exception(
                        "CommitChanges timed out efter " + max + " attempts.",
                        e);
                }
            }
        } while (true);
        ...

Answer 2

您可以尝试使用CHARINDEX和SUBSTRING

    WITH CTE
    AS
    (
        SELECT change
        FROM 
        (
            VALUES  ('changed status from "new" to "in progress"'),
                    ('changed ORT status from "in progress" to "Code Review"'),
                    ('changed MileStone from "1.1" to "1.2"')
        ) A(change)
    )

    SELECT  change,
            SUBSTRING(change,q1,q2 -q1 -1),
            SUBSTRING(change,q3,q4 -q3 -1)
    FROM CTE
    CROSS APPLY (SELECT CHARINDEX('"',change,00) + 1) CA1(q1)
    CROSS APPLY (SELECT CHARINDEX('"',change,q1) + 1) CA2(q2)
    CROSS APPLY (SELECT CHARINDEX('"',change,q2) + 1) CA3(q3)
    CROSS APPLY (SELECT CHARINDEX('"',change,q3) + 1) CA4(q4)

Answer 3

同样有效的解决方案：

SELECT  SUBSTRING(n, 1, CHARINDEX('"', n) - 1) AS ChangeType ,
        SUBSTRING(n, CHARINDEX('"', n) + 1,
                  CHARINDEX('"', n, CHARINDEX('"', n) + 1) - CHARINDEX('"', n) - 1) AS ChangeFrom ,
        REPLACE(SUBSTRING(n, PATINDEX('% to %', n) + 5, LEN(n)), '"', '') AS ChangeTo
FROM    ( VALUES ( 'changed status from "new" to "in progress"' ),
        ( 'changed ORT status from "in progress" to "Code Review" '),
        ( 'changed MileStone from "1.1" to "1.2"') ) t ( n )

返回SQL中引号前后的所有内容

3 个答案: