不同数据源最快导入方式

using System.Data.SqlClient;
using System;

class Program
{
    static void Main()
    {
        string connectionString = GetConnectionString();

        using (SqlConnection sourceConnection =
                   new SqlConnection(connectionString))
        {
            sourceConnection.Open();

            SqlCommand commandSourceData = new SqlCommand(
                "SELECT  * FROM BulkCopyDemoMatchingColumns;", sourceConnection);//源
            SqlDataReader reader =
                commandSourceData.ExecuteReader();

            using (SqlBulkCopy bulkCopy =
                       new SqlBulkCopy(connectionString))
            {
                bulkCopy.DestinationTableName =
                    "dbo.BulkCopyDemoDifferentColumns";//目标

                //bulkCopy.ColumnMappings.Add("源","目标");
                bulkCopy.ColumnMappings.Add("ProductID","ProdID");
                bulkCopy.ColumnMappings.Add("Name","ProdName");
                bulkCopy.ColumnMappings.Add("ProductNumber","ProdNum");
                try
                {
                    bulkCopy.WriteToServer(reader);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.Message);
                }
                finally
                {
                    reader.Close();
                }
            }
        }
    }

    private static string GetConnectionString()
    {
        return "Data Source=(local); " +
            " Integrated Security=true;" +
            "Initial Catalog=AdventureWorks;";
    }
}

如果数据量不是巨大,几乎是瞬间完成的!比较常用于Excel和SQL之间的数据导入!