Question

我尝试在此处执行的操作是使用GetValue3执行@ID并获取列出@fullname，@ phonenumber，@ email，@city的@results。

我遇到了2个错误，而且我一直试图弄清楚如何解决这两个问题。

错误＃1

函数中包含的Select语句无法将数据返回给客户端

错误＃2

为变量赋值的select语句不能与数据检索结合使用

我该怎么办？

Create Function GetValue3 (@ID INT)
returns nvarchar(350)
as
begin
    declare @results nvarchar(350)
    declare @fullname nvarchar(75)
    declare @phonenumber nvarchar(100)
    declare @email nvarchar(50)
    declare @city nvarchar(20)

    select -- this is where I get the first error.
        @fullname = p.Full_Name,
        @phonenumber = c.Phone, 
        @email = c.Email,
        @city = c.CityID,
        @results = @fullname, 
        @phonenumber, @email, @city -- this is where I get the 2nd error.
    from 
        d_People p, d_Contacts c
    where 
        c.PeopleID = p.PeopleID 
        and p.PeopleID = @ID;

    return @results 
end

Answer 1

尝试使用以下代码：

    Create Function GetValue3 (@ID INT)
    returns nvarchar(350)
    as
    begin
        declare @results nvarchar(350)
        declare @fullname nvarchar(75)
        declare @phonenumber nvarchar(100)
        declare @email nvarchar(50)
        declare @city nvarchar(20)

            select 

                @fullname = p.Full_Name,
                @phonenumber = c.Phone, 
                @email = c.Email,
                @city = c.CityID,
                @results = @fullname +','+ @phonenumber +','+ @email +','+ @city 
                from d_People p, d_Contacts c
                where c.PeopleID=p.PeopleID and p.PeopleID=@ID;

    return @results 
    end

Answer 2

您可以将代码更改为以下内容，我认为它会为您提供所需的内容：

create function GetValue3 (@ID int)
returns nvarchar(350)
as
begin
    declare @result nvarchar(350)

    select 
        @result = p.Full_Name + ',' + c.Phone + ',' + c.Email + ',' + c.CityID
    from d_People p
        , d_Contacts c
    where c.PeopleID = p.PeopleID
        and p.PeopleID = @ID;

    return @result
end

您收到错误的原因是因为在SELECT声明中您可以为变量或返回数据分配值，您可以＆＃39; t将两者混合在一起。

此外，@fullName和@phoneNumber等的值不是单独设置在SELECT的顶部，然后＆＃34;向下移动＆＃34;以便在@results = @fullname, @phonenumber, @email, @city可见。

Answer 3

Create Function GetValue3 (@ID INT)
returns table
as
return select p.Full_Name, c.Phone, c.Email, c.CityID
              from d_People p, d_Contacts c
              where c.PeopleID=p.PeopleID and p.PeopleID=@ID;

在存储函数中遇到select语句时遇到问题

3 个答案: