插入数据库语句比较性能

来源：互联网发布：数据库的三级模式定义编辑：程序博客网时间：2024/05/16 05:47

insert语句,sqldataadapter.update(dataset,tablename);sqlbulkcopy.WriteToServer(datatable);三个方法的性能进行比较：

生成测试的datatable表，表结构如下：

 SqlConnection sqlconnection = new SqlConnection(connectionString); SqlDataAdapter sqldataadapter = new SqlDataAdapter("select * from dTable where 1=2", sqlconnection); DataSet dataset = new DataSet(); sqldataadapter.Fill(dataset, "dTable");  DataTable datatable = dataset.Tables[0];  //生成20000条记录  for (int i = 0; i < 20000; i++)  { 　  DataRow datarow = datatable.NewRow(); 　  datarow["CompanyName"] = "companyname"+string.Format("{0:0000}",i); 　  datarow["CompanyCode"] = "companycode" + string.Format("{0:0000}", i); 　 datarow["Address"] = "address" + string.Format("{0:0000}", i); 　  datarow["Owner"] = "owner" + string.Format("{0:0000}", i); 　 datarow["Memo"] = "memo" + string.Format("{0:0000}", i); 　 datatable.Rows.Add(datarow);  }

1.使用sqlcommand.executenonquery()方法插入

foreach (DataRow datarow in datatable.Rows){　　string sql = "INSERT INTO [dTable]([CompanyName],[CompanyCode],[Address],[Owner],[Memo])" +　　"VALUES('" + datarow["CompanyName"].ToString() + "'" +　　",'" + datarow["CompanyCode"].ToString() + "'" +　　",'" + datarow["Address"].ToString() + "'" +　　",'" + datarow["Owner"].ToString() + "'" +　　",'" + datarow["Memo"].ToString() + "')";   using (SqlConnection sqlconn = new SqlConnection(connectionString))   {       sqlconn.Open();       SqlCommand sqlcommand = new SqlCommand(sql, sqlconn);       sqlcommand.ExecuteNonQuery();       sqlconn.Close();   }}

-插入20000条记录时间:00:00:29.7336000-

2.使用sqldataadapter.update(dataset,tablename);

SqlCommand insertcommand = new SqlCommand("INSERT INTO [dTable]([CompanyName],[CompanyCode],[Address],[Owner],[Memo])" +"VALUES(@CompanyName, @CompanyCode,@Address,@Owner,@Memo)",new SqlConnection(connectionString));insertcommand.Parameters.Add("@CompanyName", SqlDbType.NChar, 50, "CompanyName");insertcommand.Parameters.Add("@CompanyCode", SqlDbType.NChar, 25, "CompanyCode");insertcommand.Parameters.Add("@Address", SqlDbType.NChar, 255, "Address");insertcommand.Parameters.Add("@Owner", SqlDbType.NChar, 25, "Owner");insertcommand.Parameters.Add("@Memo", SqlDbType.NChar, 255, "Memo");sqldataadapter.InsertCommand = insertcommand;sqldataadapter.Update(dataset, "dTable");

-插入20000条记录时间:00:00:22.8938000-

3.使用sqlbulkcopy.writetoserver(datatable)

SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction);sqlbulkcopy.DestinationTableName = "dTable";//数据库中的表名sqlbulkcopy.WriteToServer(dataset.Tables[0]);

-插入20000条记录时间:00:00:00.3276000-

所以说速度是sqlbulkcopy最快，sqldataadapter.update()次之，sqlcommand.ExecuteNonQuery()最慢。

本文章来源：https://www.cnblogs.com/SuperMetalMax/p/6206700.html

阅读全文

0 0