Based on my experience, by creating a delimited expression from the employeeIDs, there is a tricky and nice solution for this problem. You should only create an string expression like ';123;434;365;' in-which 123, 434 and 365 are some employeeIDs. By calling the below procedure and passing this expression to it, you can fetch your desired records. Easily you can join the "another table" into this query. This solution is suitable in all versions of SQL server. Also, in comparison with using table variable or temp table, it is very faster and optimized solution.

CREATE PROCEDURE dbo.DoSomethingOnSomeEmployees  @List AS varchar(max)
AS
BEGIN
  SELECT EmployeeID 
  FROM EmployeesTable
  -- inner join AnotherTable on ...
  where @List like '%;'+cast(employeeID as varchar(20))+';%'
END
GO

SQL Server 2016(或更新版本)

您可以传入一个带分隔符的列表或JSON，并使用STRING_SPLIT()或OPENJSON()。

STRING_SPLIT ():

CREATE PROCEDURE dbo.DoSomethingWithEmployees
  @List varchar(max)
AS
BEGIN
  SET NOCOUNT ON;

  SELECT value FROM STRING_SPLIT(@List, ',');
END
GO
EXEC dbo.DoSomethingWithEmployees @List = '1,2,3';

OPENJSON ():

CREATE PROCEDURE dbo.DoSomethingWithEmployees
  @List varchar(max)
AS
BEGIN
  SET NOCOUNT ON;

  SELECT value FROM OPENJSON(CONCAT('["',
    REPLACE(STRING_ESCAPE(@List, 'JSON'), 
    ',', '","'), '"]')) AS j;
END
GO
EXEC dbo.DoSomethingWithEmployees @List = '1,2,3';

我在这里写了更多:

处理SQL Server中未知数量的参数 在SQL Server中使用OPENJSON进行有序字符串拆分

SQL Server 2008(或更新版本)

首先，在数据库中创建以下两个对象:

CREATE TYPE dbo.IDList
AS TABLE
(
  ID INT
);
GO

CREATE PROCEDURE dbo.DoSomethingWithEmployees
  @List AS dbo.IDList READONLY
AS
BEGIN
  SET NOCOUNT ON;
  
  SELECT ID FROM @List; 
END
GO

现在在你的c#代码中:

// Obtain your list of ids to send, this is just an example call to a helper utility function
int[] employeeIds = GetEmployeeIds();

DataTable tvp = new DataTable();
tvp.Columns.Add(new DataColumn("ID", typeof(int)));

// populate DataTable from your List here
foreach(var id in employeeIds)
    tvp.Rows.Add(id);

using (conn)
{
    SqlCommand cmd = new SqlCommand("dbo.DoSomethingWithEmployees", conn);
    cmd.CommandType = CommandType.StoredProcedure;
    SqlParameter tvparam = cmd.Parameters.AddWithValue("@List", tvp);
    // these next lines are important to map the C# DataTable object to the correct SQL User Defined Type
    tvparam.SqlDbType = SqlDbType.Structured;
    tvparam.TypeName = "dbo.IDList";
    // execute query, consume results, etc. here
}

SQL Server 2005

如果您使用的是SQL Server 2005，我仍然建议使用分割函数而不是XML。首先，创建一个函数:

CREATE FUNCTION dbo.SplitInts
(
   @List      VARCHAR(MAX),
   @Delimiter VARCHAR(255)
)
RETURNS TABLE
AS
  RETURN ( SELECT Item = CONVERT(INT, Item) FROM
      ( SELECT Item = x.i.value('(./text())[1]', 'varchar(max)')
        FROM ( SELECT [XML] = CONVERT(XML, '<i>'
        + REPLACE(@List, @Delimiter, '</i><i>') + '</i>').query('.')
          ) AS a CROSS APPLY [XML].nodes('i') AS x(i) ) AS y
      WHERE Item IS NOT NULL
  );
GO

现在你的存储过程可以是:

CREATE PROCEDURE dbo.DoSomethingWithEmployees
  @List VARCHAR(MAX)
AS
BEGIN
  SET NOCOUNT ON;
  
  SELECT EmployeeID = Item FROM dbo.SplitInts(@List, ','); 
END
GO

在你的c#代码中，你只需要将列表传递为'1,2,3,12'…

我发现传递表值参数的方法简化了使用该方法的解决方案的可维护性，并且与其他实现(包括XML和字符串分割)相比，常常提高了性能。

输入是明确定义的(没有人需要猜测分隔符是逗号还是分号)，并且我们对其他处理函数没有依赖关系，如果不检查存储过程的代码，这些依赖关系就不明显。

与使用用户定义的XML模式而不是udt的解决方案相比，这涉及到类似数量的步骤，但根据我的经验，管理、维护和阅读代码要简单得多。

在许多解决方案中，您可能只需要为许多存储过程重用一个或几个这样的udt(用户定义类型)。与本例一样，常见的要求是传递一个ID指针列表，函数名描述这些ID应该表示的上下文，类型名应该是泛型的。

您需要将其作为XML参数传递。

编辑:快速代码从我的项目给你一个想法:

CREATE PROCEDURE [dbo].[GetArrivalsReport]
    @DateTimeFrom AS DATETIME,
    @DateTimeTo AS DATETIME,
    @HostIds AS XML(xsdArrayOfULong)
AS
BEGIN
    DECLARE @hosts TABLE (HostId BIGINT)

    INSERT INTO @hosts
        SELECT arrayOfUlong.HostId.value('.','bigint') data
        FROM @HostIds.nodes('/arrayOfUlong/u') as arrayOfUlong(HostId)

然后您可以使用临时表来连接您的表。 我们将arrayOfUlong定义为一个内置的XML模式，以维护数据完整性，但您不必这样做。我建议使用它，这里有一个快速代码，以确保您总是得到一个带long的XML。

IF NOT EXISTS (SELECT * FROM sys.xml_schema_collections WHERE name = 'xsdArrayOfULong')
BEGIN
    CREATE XML SCHEMA COLLECTION [dbo].[xsdArrayOfULong]
    AS N'<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="arrayOfUlong">
        <xs:complexType>
            <xs:sequence>
                <xs:element maxOccurs="unbounded"
                            name="u"
                            type="xs:unsignedLong" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>';
END
GO

为存储过程使用表值参数。

当您从c#传递它时，您将添加数据类型为SqlDb.Structured的参数。

请看这里:http://msdn.microsoft.com/en-us/library/bb675163.aspx

例子:

// Assumes connection is an open SqlConnection object.
using (connection)
{
// Create a DataTable with the modified rows.
DataTable addedCategories =
  CategoriesDataTable.GetChanges(DataRowState.Added);

// Configure the SqlCommand and SqlParameter.
SqlCommand insertCommand = new SqlCommand(
    "usp_InsertCategories", connection);
insertCommand.CommandType = CommandType.StoredProcedure;
SqlParameter tvpParam = insertCommand.Parameters.AddWithValue(
    "@tvpNewCategories", addedCategories);
tvpParam.SqlDbType = SqlDbType.Structured;

// Execute the command.
insertCommand.ExecuteNonQuery();
}

从SQL Server 2016开始，您可以将列表作为NVARCHAR()并使用OPENJSON

DECLARE @EmployeeList nvarchar(500) = '[1,2,15]'


SELECT * 
FROM Employees
WHERE ID IN (SELECT VALUE FROM OPENJSON(@EmployeeList ))

我一直在搜索所有的例子和答案，如何传递任何数组到sql server，而不需要创建新的表类型的麻烦，直到我发现了这个链接，下面是我如何将它应用到我的项目:

——下面的代码将获取一个数组作为参数，并插入该数组的值 ——数组到另一个表

Create Procedure Proc1 


@UserId int, //just an Id param
@s nvarchar(max)  //this is the array your going to pass from C# code to your Sproc

AS

    declare @xml xml

    set @xml = N'<root><r>' + replace(@s,',','</r><r>') + '</r></root>'

    Insert into UserRole (UserID,RoleID)
    select 
       @UserId [UserId], t.value('.','varchar(max)') as [RoleId]


    from @xml.nodes('//root/r') as a(t)
END 

希望大家喜欢