在C＃中将SQL查询的结果从一个数据库插入另一个数据库

Question

如何使用C＃从一个数据库表中获取select语句的结果并将其插入到另一个数据库表中？

问题是我需要在C＃代码中使用2个不同的连接字符串。 到目前为止，这是我目前无法使用的..

        string sCMD_All = "SELECT * FROM table";
        SqlDataAdapter da = new SqlDataAdapter();
        DataSet ds = new DataSet();

        using (SqlConnection myConn = new SqlConnection(ConnectionString))
        {
            using (SqlCommand myCommand = new SqlCommand(sCMD_All, myConn))
            {
                myConn.Open();
                SqlDataReader reader = myCommand.ExecuteReader();
                da.Fill(ds);
                myConn.Close();
            }
        }
        DataTable sqTable = ds.Tables[0];

        //insert into server database
        DataTable newTable = new DataTable();
        newTable = sqTable;
        using (SqlConnection myConn = new SqlConnection(ConnectionString_M))
        {
            string sCMD_I = "INSERT INTO tableNew @newTable";

            using (SqlCommand myCommand = new SqlCommand(sCMD_I, myConn))
            {
                myConn.Open();
                SqlDataReader reader = myCommand.ExecuteReader();
                myConn.Close();
            }
        }

---

问题是我需要在C＃代码中使用2个不同的连接字符串。 到目前为止，这是我目前无法使用的..

    string sCMD_All = "SELECT * FROM table";
    SqlDataAdapter da = new SqlDataAdapter();
    DataSet ds = new DataSet();

    using (SqlConnection myConn = new SqlConnection(ConnectionString))
    {
        using (SqlCommand myCommand = new SqlCommand(sCMD_All, myConn))
        {
            myConn.Open();
            SqlDataReader reader = myCommand.ExecuteReader();
            da.Fill(ds);
            myConn.Close();
        }
    }
    DataTable sqTable = ds.Tables[0];

    //insert into server database
    DataTable newTable = new DataTable();
    newTable = sqTable;
    using (SqlConnection myConn = new SqlConnection(ConnectionString_M))
    {
        string sCMD_I = "INSERT INTO tableNew @newTable";

        using (SqlCommand myCommand = new SqlCommand(sCMD_I, myConn))
        {
            myConn.Open();
            SqlDataReader reader = myCommand.ExecuteReader();
            myConn.Close();

Answer 1

将SELECT ... INTO ...与完全限定的表名database.schema.object_name ，如下所示：

USE DatabaseName;

SELECT *
FROM DatabaseName.schemaname.Tablename
INSERT INTO AnotherDatabase.schemaname.AnotherTablename;

然后，您可以使用ADO.net或其他API从C＃执行此查询。

Answer 2

SqlCommand Data = new SqlCommand("Select * FROM " + DBTableName + " WHERE " + DBColName + " = " + ColumnId + ";", this.con);
SqlDataAdapter SqAdptr = new SqlDataAdapter(Data);
DataSet SqDataset = new DataSet();
SqAdptr.Fill(SqDataset);
DataTable sqTable = SqDataset.Tables[0];

将此表转移到新的数据表

DataTable NewTable = new DataTable();
NewTable = sqlTable;

Answer 3

INSERT INTO [INSERTDATABASE].[dbo].[INSERTTABLE] 
SELECT * FROM [CURRENTDATABASE].[dbo].[CURRENTTABLE] 

Answer 4

如果由于权限或性能而不能/不想使用Linked Server，则在获得DataTable对象后，可以调用以下函数将数据插入位于不同服务器的第二数据库中。 这个对我有用。

CopyDataFromOneToOther(DB2, myDataTable, "tableName");


private static void CopyDataFromOneToOther(String sConnStr, DataTable dt, String sTableName)
{
    using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sConnStr, SqlBulkCopyOptions.TableLock)) {
    bulkCopy.DestinationTableName = sTableName;
    bulkCopy.WriteToServer(dt);
    }                    
}