將同一列中的值與 SQL Server 中的其他列進行比較

Question

我有一張如下表

id      ParentName    HandleName       CreatedDate       
===================================================
139       MI          MI-Chart-QL       2018-02-20       
139       MI          MI-chart-act      2018-02-20       
139       MI          MI-chart-act      2018-02-20       
139       CRA         CRA-chart-act     2018-02-20
139       CRA         CRA-Chart-act     2018-02-20

我想添加一個帶有值的列 - 如果帶有Act的 HandleName 與帶有QL的 id、CreatedDate 和 ParentName 的 HandleName 具有相同的 id、CreatedDate 和 ParentName，則有意或無意地添加一個列，那么它是有意的。 我要找的決賽桌是

id      ParentName    HandleName       CreatedDate    Intentionally/unintentionally   
====================================================================================
139       MI          MI-Chart-QL       2018-02-20       Intentionally
139       MI          MI-chart-act      2018-02-20       Intentionally
139       MI          MI-chart-act      2018-02-20       Intentionally
139       CRA         CRA-chart-act     2018-02-20       Unintentionally   
139       CRA         CRA-Chart-act     2018-02-20       Unintentionally 
  

帶有“CRA-chart-act”的 HandleName 是無意的，因為 ParentName 與“MI-Chart-QL”不匹配

我使用了下面的代碼（如果 Row_Number()>2 我可以故意標記它們）但是我如何檢查它們的父名稱是否相同以有意或無意地標記它們？

Row_Number() over (Partition by id, CreatedDate ORDER BY createdDate asc)

Answer 1

您可以使用窗口函數：

select t.*,
    case when max(case when handlename like '%-QL%' then 1 else 0 end)
                  over(partition by id, parentname, createddate) = 1
        then 'Intentionally'
        else 'Unintentionally'
    end as status
from mytable t

Answer 2

這是另一種方式：

SELECT
    t1.*
    , CASE
          WHEN t2.Intentionally = 1 THEN 'Intentionally'
          ELSE 'Unintentionally'
      END AS 'Intentionally/unintentionally'
FROM
    mytable t1
    OUTER APPLY
    (
        SELECT TOP 1
            1 AS 'Intentionally'
        FROM
            mytable t2
        WHERE
            t1.parentName = t2.parentname
            AND t1.CreatedDate = t2.CreatedDate
            AND t2.HandleName LIKE '%QL'
    )       t2;