Question

我当前的表格输出是

        ---------------------------------------------------
        |    id               col1            col2        |
        ---------------------------------------------------
        |    1           |    test1      |    1           |
        |    2           |    test11     |    0           |
        |    3           |    test12     |    0           |
        |    4           |    test13     |    0           |
        |    5           |    test14     |    0           |
        |    6           |    test2      |    2           |
        |    7           |    test21     |    0           |
        |    8           |    test22     |    0           |
        |    9           |    test23     |    0           |
        |    10          |    test24     |    0           |
        ---------------------------------------------------

预期输出

        ---------------------------------------------------
        |    id               col1            col2        |
        ---------------------------------------------------
        |    1           |    test1      |    1           |
        |    2           |    test11     |    1           |
        |    3           |    test12     |    1           |
        |    4           |    test13     |    1           |
        |    5           |    test14     |    1           |
        |    6           |    test2      |    2           |
        |    7           |    test21     |    2           |
        |    8           |    test22     |    2           |
        |    9           |    test23     |    2           |
        |    10          |    test24     |    2           |
        ---------------------------------------------------

没有光标可以吗？有没有办法在当前行值为0的情况下将顶行值添加到当前行值？

Answer 1

您可以找到col2的最后一个非零值，如：

select  id
,       col1
,       (
        select  top 1 col2
        from    YourTable yt2
        where   yt2.id <= yt1.id
                and yt2.col2 <> 0
        order by
                yt2.id desc
        )
from    YourTable yt1

Example at SQL Fiddle.

Answer 2

看起来你不是在追求一笔钱。这应该在2005年或以后工作：

DECLARE @tmp TABLE
    (
        id INT PRIMARY KEY
        , col1 VARCHAR(20)
        , col2 INT
    );
INSERT @tmp
VALUES
(1, 'test1',  1)
, (2, 'test11', 0)
, (3, 'test12', 0)
, (4, 'test13', 0)
, (5, 'test14', 0)
, (6, 'test2', 2)
, (7, 'test21', 0)
, (8, 'test22', 0)
, (9, 'test23', 0)
, (10, 'test24', 0);


SELECT 
    t1.id
    , t1.col1
    , CASE t1.col2
        WHEN 0 
            THEN t2.col2
        ELSE 
            t1.col2
    END col2
FROM 
    @tmp t1
OUTER APPLY
    (
        SELECT 
            TOP 1 col2
        FROM 
            @tmp t3
        WHERE 
            t3.id <= t1.id
            AND 
            t3.col2 > 0
        ORDER BY 
            t3.id DESC
    ) t2

根据条件将顶行值添加到当前行

2 个答案: