Question

Is it possible to write stored procedure that works with a variable number of parameters? (in SQL Server 2005)

Answer 1

Yes, you could write a stored procedure in C# or VB.NET and include it as a SQLCLR stored procedure.

A C# method can accept a params parameter of variable length.

using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;

public partial class StoredProcedures
{
    [SqlProcedure()]
    public static void InsertSomeValues(SqlString currencyCode, 
                                        SqlString name, 
                                        params object[] args)
    {
        using (SqlConnection conn = new SqlConnection("context connection=true"))
        {
            ...... do whatever you need to do here........
        }
    }
}

The SQL CLR – the inclusion of the .NET runtime into SQL Server – was introduced with SQL Server 2005. See the MSDN docs for more details.