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【转】DataTable的数据批量写入SQL SERVER数据库方法速度比较

最近在将excel中的文件导入到数据库中,用程序进行编写,由于数据量较大所以速度很慢,后来采用了SqlBulkCopy类,解决了速度的问题,我就insert语句,sqldataadapter.update(dataset,tablename);sqlbulkcopy.WriteToServer(datatable);三个方法的性能进行比较:

1、生成测试的datatable表,表结构如下:

UniqueID(主键,自动增长) | CompanyName | CompanyCode |
Address | Owner | Memo

共6个字段。

SqlConnection sqlconnection = new
SqlConnection(connectionString);
SqlDataAdapter sqldataadapter = new
SqlDataAdapter(“select * from Table_1 where 1=2”,
sqlconnection);
DataSet dataset = new
DataSet();
sqldataadapter.Fill(dataset,
“Table_1”);
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);
}

2、使用sqlcommand.executenonquery()方法插入

foreach (DataRow datarow in
datatable.Rows)
{
string sql = “INSERT INTO [Table_1]

([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

3、使用sqldataadapter.update(dataset,tablename);

SqlCommand insertcommand = new
SqlCommand(“INSERT INTO
[Table_1]([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,
“Table_1”);

插入20000条记录时间:00:00:22.8938000

4、使用sqlbulkcopy.writetoserver(datatable)

SqlBulkCopy sqlbulkcopy = new
SqlBulkCopy(connectionString,
SqlBulkCopyOptions.UseInternalTransaction);
sqlbulkcopy.DestinationTableName =
“Table_1”;//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。

转自:http://apps.hi.baidu.com/share/detail/16973788

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