在插入查询中动态选择列名

Question

获取错误列名称"@ColumnNames"无效.在最后一行(插入子句),任何想法为什么？

Declare @ColumnNames varchar(2000)
Declare @OrderId int
set @OrderId = 110077

select @ColumnNames = COALESCE(@ColumnNames + ', ', '') + COLUMN_NAME
    from 
        INFORMATION_SCHEMA.COLUMNS
    where 
        TABLE_NAME='OrderItems'

Insert into dbo.OrderHistory(@ColumnNames) select * from dbo.[Order] where ID= @OrderId

Answer 1

@ColumnNames是一个文本字符串,而不是列的列表.因此,当您尝试将其用作插入查询中的列名列表时,它将失败.

您可以使用动态SQL来执行您想要的操作,如下所示:

declare @insertquery nvarchar(1000)
set @insertquery = N'insert into dbo.orderhistory(' + @ColumnNames + ') select * from dbo.[Order] where ID=' + cast(@OrderId as nvarchar(10))

sp_executesql @insertquery