Question

我想请求您就此事提供帮助。

我需要一个可以更新其中一个表的列的变量。

我遇到的第一个问题是我需要从一系列列中检索数据，检查这些列是否为数字。

为了解决这个问题，我使用了TSQL，效果很好。现在，我似乎走到了尽头。我需要检索此过程的结果。我尝试将其转换为函数，但是根据许多试验（以及一些谷歌搜索）似乎TSQL不能用于here所述的函数，所以我坚持使用存储过程，但是如何检索结果？我试图使用OUTPUT参数，但是我遇到了这个错误

The formal parameter "@R" was not declared as an OUTPUT parameter, but the actual parameter passed in requested output.

即使我将R声明为输出参数，我也声明@R在我的sp_executesql事务中输出结果，但我仍然得到错误，请问是什么我做错了吗？

请保存，存储过程正常，我只需要输出。谢谢。

ALTER procedure [dbo].[SaveRinHead]


@SumNo as nvarchar(15)
,@R as decimal(18,3) output

as

declare @cursor CURSOR
declare @colname as integer
declare @top as integer
declare @query as nvarchar(MAX)
declare @TSQL as nvarchar(MAX) 
declare @topass as nvarchar(MAX) = ''
declare @DimItem as nvarchar(10)

set @DimItem = (select distinct dimitem from SumNo)

SET @cursor = CURSOR FOR 
(select cast([Name] as decimal(18,0)) from sys.columns where object_id in (select object_id from sys.tables where [name] = 'ADetails' )and [Name] in ('1','2','3','4','5','6','7','8','9','10'))order by [Name] asc


OPEN @cursor

FETCH NEXT

FROM @cursor INTO @colname
WHILE @@FETCH_STATUS = 0
BEGIN



    set @top =  (select CASE WHEN Isnumeric(@colname) = 1
    THEN CONVERT(int,@colname) 
    ELSE 0 END AS COLUMNA)

    if @top  <= '5'
    BEGIN
    set @query =  '(['+cast(@top as nvarchar(10)) + ']) ,'
    set @topass = rtrim(ltrim(@topass)) +' '+rtrim(ltrim(@query))

    END

FETCH NEXT

FROM @cursor INTO @colName
END

CLOSE @cursor
DEALLOCATE @cursor


set @topass =  (SELECT SUBSTRING(@topass,1, len(@topass)-1))

begin


set @TSQL = '
SELECT @R = (MAX(MaxValue) - MIN(MinValue)) FROM ADetails
CROSS APPLY (SELECT MIN(d) MinValue FROM (VALUES '+@topass+' ) AS a(d)) X 
CROSS APPLY (SELECT MAX(d) MaxValue FROM (VALUES '+@topass+' ) AS a(d)) Y
where SumNo= @SumNo'

exec sp_executesql @TSQL, N'@DimItem nvarchar(10), @R decimal(18,3), @SumNo nvarchar(15)', @DimItem, @R output, @SumNo

update ADetails set R = @R where SumNo= @SumNo


end

Answer 1

根据docs，您需要在调用output时在两者参数声明和参数列表中指定sp_executesql关键字：

exec sp_executesql @TSQL, N'@DimItem nvarchar(10), @R decimal(18,3) output, @SumNo nvarchar(15)',
  @DimItem, @R output, @SumNo;

如何使用OUTPUT参数检索存储过程的结果

1 个答案: