程序或函数“期望参数”，该参数没有提供。

I am new to SQL and trying to write a stored procedure. I am having some difficulties to get default values as an output result.

我是SQL新手，正在尝试编写一个存储过程。我很难得到默认值作为输出结果。

I have 2 table:

我有两个表:

Student_Input:

Student_Input:

InputID SectionID  ParameterName    Sequence
------------------------------------------------     
  1     100        FirstName           1 
  2     100        MiddleName          2  
  3     100        LastName            3

Student_Input_details:

Student_Input_details:

ParameterName   ParameterValue      DefaultValue
-----------------------------------------------------     
FirstName          John                  1    
FirstName          Troy                  0
FirstName          Mark                  0

I am trying to call ParameterName from Student_Input and Its default value from Student_Input_Details as an output in one table. I am trying with following query but I am getting following error:

我尝试从Student_Input和Student_Input_Details中的默认值调用ParameterName作为一个表中的输出。我正在尝试以下查询，但我得到以下错误:

Msg 201, Level 16, State 4, Procedure Getparameterdefaultvalues, Line 0
Procedure or function 'Getparameterdefaultvalues' expects parameter '@ParameterValue', which was not supplied.

msg201，级别16，状态4，过程Getparameterdefaultvalues，第0行过程或函数“Getparameterdefaultvalues”，它没有提供。

I am sure I am missing something important here.

我肯定我漏掉了一些重要的东西。

My query is below. I am learning , it may be an easy question. Thx........

我下面的查询。我正在学习，这可能是一个简单的问题。Thx ........

CREATE PROCEDURE Getparameterdefaultvalues
(
    @ParameterName varchar(50) ,
    @ParameterValue varchar(50) OUT
)
AS
BEGIN
    SELECT @ParameterValue = DefaultValue FROM ParameterInput_Values
    WHERE ParameterName=@ParameterName 
END
DECLARE @ParameterValue varchar(50) 
EXEC Getparameterdefaultvalues @ParameterName = 1, @ParameterValue OUTPUT
PRINT 'Result is: ' + @ParameterValue

I need result like (i.e. ParameterName should only display its default value at runtime):

我需要这样的结果(例如，参数名应该在运行时显示它的默认值):

ParameterName   ParameterValue      
---------------------------------- 
FirstName         John

I have tried on other blogs but couldn't resolve this. Apologies If my question is not so cleared. Any help would be great!! Thx

我曾在其他博客上尝试过，但没能解决这个问题。如果我的问题没有得到解决，我很抱歉。任何帮助都是伟大的!!谢谢

1 个解决方案

#1

Pretty simple and easy: your stored procedure expects two parameters - @ParameterName and @ParameterValue - but your call only supplies one...

非常简单和简单:您的存储过程需要两个参数—@ParameterName和@ParameterValue—但是您的调用只提供一个参数……

You should call your stored procedure like this:

您应该这样调用存储过程:

DECLARE @ParameterValue varchar(50) 

EXEC Getparameterdefaultvalues @ParameterName = 1, @ParameterValue = @ParameterValue OUTPUT

PRINT 'Result is: ' + @ParameterValue

Also: you're returning the retrieved value as an output parameter - so you're getting back a single value into a variable - you're not getting back a result set (rows/columns).

另外，您将检索到的值作为输出参数返回——因此您将返回一个值到变量中——您不会返回一个结果集(行/列)。

#1