Question

我已经创造了这个spx，但我需要它是动态的，在某种意义上是动态的，它应该接受

表名列按列排序

所以我可以让这个spx在所有表格中全局工作，只是说在这里我不发送我将要删除的表格的pk

ALTER PROCEDURE [dbo].[spx_DeleteDuplicates]
AS
BEGIN
  WITH DupsNumbered
    AS (
    SELECT [columns List],
    ROW_NUMBER() OVER (PARTITION BY [columns List] ORDER BY [orderList]) AS rn
    FROM [table]
    )
    DELETE DupsNumbered
    WHERE rn > 1;
END

您在[]中看到的所有项目都需要是动态的，我怎样才能让它变得动态

Answer 1

不是动态SQL的巨大支持者，但如果你必须

ALTER PROCEDURE [dbo].[spx_DeleteDuplicates] (@TableName varchar(100),@ColumnList varchar(max),@OrderList varchar(max))
AS
BEGIN
    Declare @SQL varchar(max)='
      WITH DupsNumbered
        AS (
        SELECT [ColumnsList],
        ROW_NUMBER() OVER (PARTITION BY [ColumnsList] ORDER BY [OrderList]) AS rn
        FROM [TableName]
        )
        DELETE DupsNumbered
        WHERE rn > 1;
    '
    Set @SQL=Replace(@SQL,'[TableName]'  ,@TableName)
    Set @SQL=Replace(@SQL,'[ColumnsList]',@ColumnList)
    Set @SQL=Replace(@SQL,'[OrderList]'  ,@OrderList)
    Exec(@SQL)
END

Answer 2

如果您的行完全重复，我会保持简单：

    Select distinct *
    Into #temptable
    From [table] ;

    Truncate table [table];

    Select *
    Into [table] 
    From #temptable

spx已创建，但需要它是动态的

2 个答案: