最有效的方式将行插入MySQL数据库 [英] Most efficient way to insert Rows into MySQL Database

问题描述

我已经读了很多有关的问题，但我找不到一个足够快。我认为有更好的方法来插入很多行到一个MySQL数据库

I've read a lot of questions about that but i couldn't find one that is fast enough. I think there are better ways to insert a lot of rows into a MySQL Database

我用下面的code插入到100K我的MySQL数据库内数据：

I use the following code to insert 100k into my MySQL-Database:

public static void CSVToMySQL()
{
    string ConnectionString = "server=192.168.1xxx";
    string Command = "INSERT INTO User (FirstName, LastName ) VALUES (@FirstName, @LastName);";
    using (MySqlConnection mConnection = new MySqlConnection(ConnectionString))
    {
        mConnection.Open();

        for(int i =0;i< 100000;i++) //inserting 100k items
        using (MySqlCommand myCmd = new MySqlCommand(Command, mConnection))
        {
            myCmd.CommandType = CommandType.Text;
            myCmd.Parameters.AddWithValue("@FirstName", "test");
            myCmd.Parameters.AddWithValue("@LastName", "test");
            myCmd.ExecuteNonQuery();
        }
    }
}

这花费10万行约40秒。我怎样才能使这个快还是有点更有效率？

This takes for 100k rows about 40 seconds. How can i make this faster or a little more efficient?

可能会更快通过一个DataTable / DataAdapter的或一次插入多行：

Might be faster to insert multiple rows via a DataTable/DataAdapter or at once:

INSERT INTO User (Fn, Ln) VALUES (@Fn1, @Ln1), (@Fn2, @Ln2)...

由于安全问题，我无法将数据加载到一个文件，并MySQLBulkLoad它。

Due to security issues i can't load the data into a file and MySQLBulkLoad it.

推荐答案

这是我的多个插入 - code。 100K的行插入了而不是40秒才检查第3秒。！

here is my "multiple inserts"-code. The insertion of 100k rows took instead of 40 seconds only 3 seconds!!

public static void BulkToMySQL()
{
    string ConnectionString = "server=192.168.1xxx";
    StringBuilder sCommand = new StringBuilder("INSERT INTO User (FirstName, LastName) VALUES ");           
    using (MySqlConnection mConnection = new MySqlConnection(ConnectionString))
    {
        List<string> Rows = new List<string>();
        for (int i = 0; i < 100000; i++)
        {
            Rows.Add(string.Format("('{0}','{1}')", MySqlHelper.EscapeString("test"), MySqlHelper.EscapeString("test")));
        }
        sCommand.Append(string.Join(",", Rows));
        sCommand.Append(";");
        mConnection.Open();
        using (MySqlCommand myCmd = new MySqlCommand(sCommand.ToString(), mConnection))
        {
            myCmd.CommandType = CommandType.Text;
            myCmd.ExecuteNonQuery();
        }
    }
}

这reults到

INSERT INTO User (FirstName, LastName) VALUES ('test','test'),('test','test'),... ;

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