Question

以下问题的最佳解决方案是什么？

所以我有一个存储过程插入临时表信息，如：

    Id | Name |   Date            |  Age  | Bin |Status| Description |  Warn1
    -----------------------------------------------------------------------
    01 | abcd |2016-01-01 15:00:00|  17   | 0   | 40   | Done        |  0
    01 | abcd |2016-01-01 11:00:00|  17   | 0   | 30   | Waiting     |  0
    01 | abcd |2016-01-01 10:00:00|  17   | 0   | 10   | Started     |  0

    02 | zxcv |2016-01-02 11:30:00|  18   | 0   | 35   | Error       |  0
    02 | zxcv |2016-01-02 11:00:00|  18   | 0   | 30   | Waiting     |  0
    02 | zxcv |2016-01-02 10:00:00|  18   | 0   | 10   | Started     |  0

    03 | yttr |2016-01-02 12:30:00|  16   | 0   | 30   | Waiting     |  0
    03 | yttr |2016-01-02 10:00:00|  16   | 0   | 10   | No desc     |  0

    04 | huuo |2016-01-02 11:30:00|  17   | 0   | 40   | Done        |  0
    04 | huuo |2016-01-02 09:00:00|  17   | 0   | 30   | Waiting     |  0
    04 | huuo |2016-01-02 08:00:00|  17   | 0   | 10   | Started     |  0

    05 | test |2016-01-03 10:00:00|  10   | 0   | 11   | Error       |  0
    05 | test |2016-01-03 09:00:00|  10   | 0   | 10   | Started     |  0

我有2个变量@maxStatus和@description，我想保留所有相同id的所有信息Status = @maxStatus和Description = @description。

例如，如果@maxStatus = 40且@description =＆＃39;完成＆＃39;结果表应该是：

Id | Name |   Date            |  Age  | Bin |Status| Description |  Warn1
-----------------------------------------------------------------------
01 | abcd |2016-01-01 15:00:00|  17   | 0   | 40   | Done        |  0
01 | abcd |2016-01-01 11:00:00|  17   | 0   | 30   | Waiting     |  0
01 | abcd |2016-01-01 10:00:00|  17   | 0   | 10   | Started     |  0
04 | huuo |2016-01-02 11:30:00|  17   | 0   | 40   | Done        |  0
04 | huuo |2016-01-02 09:00:00|  17   | 0   | 30   | Waiting     |  0
04 | huuo |2016-01-02 08:00:00|  17   | 0   | 10   | Started     |  0

如果@maxStatus = 11且@description =＆＃39;错误＆＃39;结果表应该是：

 Id | Name |   Date            |  Age  | Bin |Status| Description |  Warn1
 -----------------------------------------------------------------------
 05 | test |2016-01-03 10:00:00|  10   | 0   | 11   | Error       |  0
 05 | test |2016-01-03 09:00:00|  10   | 0   | 10   | Started     |  0

编辑：澄清：如果具有最大状态= @maxStatus

，则sp应仅返回ID的行

例如@maxStatus = 30和@description =＆＃39; Waiting＆＃39; ，maxium状态为30且等待描述的唯一ID是＆＃39; 03＆＃39; ;所有其他人的最大状态与@maxStatus

不同

 Id | Name |   Date            |  Age  | Bin |Status| Description |  Warn1
 -----------------------------------------------------------------------
 03 | yttr |2016-01-02 12:30:00|  16   | 0   | 30   | Waiting     |  0
 03 | yttr |2016-01-02 10:00:00|  16   | 0   | 10   | No desc     |  0

Answer 1

您可以使用exists：

执行此操作

select t.*
from #tmp t
where exists (select 1
              from #tmp t2
              where t2.id = t.id and
                    t2.Status = @maxStatus and
                    t2.Description = @description
             );

如果你的表很大，那么(id, status, description)上的索引会有所帮助。

编辑：

您似乎希望状态的最大值匹配。我不确定description与问题的真正关系，因为每个状态的描述都是相同的。所以，你可以这样做：

select t.*
from (select t.*, max(status) over (partition by id) as maxstatus
      from #tmp t
     ) t
where maxStatus = @maxStatus

Answer 2

您可以如下所示：

SELECT
 *
FROM
    Tbl A
WHERE
    A.Id IN (SELECT B.Id FROM Tbl B WHERE B.Description  = @description) AND
    Status <= @maxStatus

<强>更新

SELECT
 *
FROM
    Tbl A
WHERE
    A.Id IN (SELECT B.Id FROM Tbl B WHERE B.Description  = @description) AND
    A.Id IN (SELECT C.Id FROM (SELECT B.Id, MAX(Status) MaxStatus FROM Tbl B GROUP BY B.Id) C WHERE C.MaxStatus <= @maxStatus )

Answer 3

试试这个，

SELECT id, name, date, age, bin, status, description, warn1
FROM TABLE_NAME
WHERE id IN
          (
           SELECT id
           FROM TABLE_NAME
           WHERE  status=@maxStatus 
           AND description=@description
          )

Sql Server：比较多个日期，删除重复项并在一个

3 个答案: