c#批量插入
2021-06-08 17:03
标签：oid 格式 open() get error using 批量 ram form 运行结果： 100w条记录，插完要俩小时了 语法如下： 相关参数说明： 代码： c#批量插入 标签：oid 格式 open() get error using 批量 ram form 原文地址：https://www.cnblogs.com/hyunbar/p/10691149.html一、创建一个用来测试的数据库和表
1 USE [Test]
2 GO
3 /****** Object: Table [dbo].[student] Script Date: 2019/4/11 15:38:59 ******/
4 SET ANSI_NULLS ON
5 GO
6 SET QUOTED_IDENTIFIER ON
7 GO
8 CREATE TABLE [dbo].[student](
9 [id] [int] IDENTITY(1,1) NOT NULL,
10 [name] [nvarchar](50) NULL,
11 [age] [int] NULL,
12 [createDate] [datetime] NULL,
13 CONSTRAINT [PK_student] PRIMARY KEY CLUSTERED
14 (
15 [id] ASC
16 )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
17 ) ON [PRIMARY]
18
19 GO
方式1：一条一条插入，性能最差
1 INSERT INTO student(name,age,createDate) VALUES(‘苏拉自摸1‘,1,‘2018-4-11‘);
2 INSERT INTO student(name,age,createDate) VALUES(‘苏拉自摸2‘,2,‘2018-4-11‘);
1 public void InsertOne()
2 {
3 Console.WriteLine("采用一条一条插入的方式实现");
4 Stopwatch sw = new Stopwatch();
5
6 using (SqlConnection conn = new SqlConnection(Conn)) //using中会自动Open和Close 连接。
7 {
8 string sql = "INSERT INTO student(name,age,createDate) VALUES(@a,@p,@d)";
9 conn.Open();
10 for (int i = 0; i 1000000; i++)
11 {
12 using (SqlCommand cmd = new SqlCommand(sql, conn))
13 {
14 cmd.Parameters.AddWithValue("@a", "花拉子模" + i);
15 cmd.Parameters.AddWithValue("@p", i);
16 cmd.Parameters.AddWithValue("@d", DateTime.Now);
17 sw.Start();
18 cmd.ExecuteNonQuery();
19 Console.WriteLine(string.Format("插入{0}条记录，已耗时{1}毫秒",i, sw.ElapsedMilliseconds));
20 }
21 if (i == 1000)
22 {
23 sw.Stop();
24 break;
25 }
26 }
27 }
28 Console.WriteLine(string.Format("插入{0}条记录，每{4}条的插入时间是{1}毫秒,预估总得插入时间是{2}毫秒，{3}分钟",
29 1000000, sw.ElapsedMilliseconds, ((sw.ElapsedMilliseconds / 1000) * 1000000), GetMinute((sw.ElapsedMilliseconds / 1000 * 1000000)), 1000));
30 }
方式2：使用sqlBulk
1 BULK INSERT [ [ ‘database_name‘.][ ‘owner‘ ].]{ ‘table_name‘ FROM ‘data_file‘ }
2 WITH (
3 [ BATCHSIZE [ = batch_size ] ],
4 [ CHECK_CONSTRAINTS ],
5 [ CODEPAGE [ = ‘ACP‘ | ‘OEM‘ | ‘RAW‘ | ‘code_page‘ ] ],
6 [ DATAFILETYPE [ = ‘char‘ | ‘native‘| ‘widechar‘ | ‘widenative‘ ] ],
7 [ FIELDTERMINATOR [ = ‘field_terminator‘ ] ],
8 [ FIRSTROW [ = first_row ] ],
9 [ FIRE_TRIGGERS ],
10 [ FORMATFILE = ‘format_file_path‘ ],
11 [ KEEPIDENTITY ],
12 [ KEEPNULLS ],
13 [ KILOBYTES_PER_BATCH [ = kilobytes_per_batch ] ],
14 [ LASTROW [ = last_row ] ],
15 [ MAXERRORS [ = max_errors ] ],
16 [ ORDER ( { column [ ASC | DESC ] } [ ,...n ] ) ],
17 [ ROWS_PER_BATCH [ = rows_per_batch ] ],
18 [ ROWTERMINATOR [ = ‘row_terminator‘ ] ],
19 [ TABLOCK ],
20 )
1 BULK INSERT
2 [ database_name . [ schema_name ] . | schema_name . ] [ table_name | view_name ]
3 FROM ‘data_file‘
4 [ WITH
5 (
6 [ [ , ] BATCHSIZE = batch_size ] --BATCHSIZE指令来设置在单个事务中可以插入到表中的记录的数量
7 [ [ , ] CHECK_CONSTRAINTS ] --指定在大容量导入操作期间，必须检查所有对目标表或视图的约束。若没有 CHECK_CONSTRAINTS 选项，则所有 CHECK 和 FOREIGN KEY 约束都将被忽略，并且在此操作之后表的约束将标记为不可信。
8 [ [ , ] CODEPAGE = { ‘ACP‘ | ‘OEM‘ | ‘RAW‘ | ‘code_page‘ } ] --指定该数据文件中数据的代码页
9 [ [ , ] DATAFILETYPE =
10 { ‘char‘ | ‘native‘| ‘widechar‘ | ‘widenative‘ } ] --指定 BULK INSERT 使用指定的数据文件类型值执行导入操作。
11 [ [ , ] FIELDTERMINATOR = ‘field_terminator‘ ] --标识分隔内容的符号
12 [ [ , ] FIRSTROW = first_row ] --指定要加载的第一行的行号。默认值是指定数据文件中的第一行
13 [ [ , ] FIRE_TRIGGERS ] --是否启动触发器
14 [ [ , ] FORMATFILE = ‘format_file_path‘ ]
15 [ [ , ] KEEPIDENTITY ] --指定导入数据文件中的标识值用于标识列
16 [ [ , ] KEEPNULLS ] --指定在大容量导入操作期间空列应保留一个空值，而不插入用于列的任何默认值
17 [ [ , ] KILOBYTES_PER_BATCH = kilobytes_per_batch ]
18 [ [ , ] LASTROW = last_row ] --指定要加载的最后一行的行号
19 [ [ , ] MAXERRORS = max_errors ] --指定允许在数据中出现的最多语法错误数，超过该数量后将取消大容量导入操作。
20 [ [ , ] ORDER ( { column [ ASC | DESC ] } [ ,...n ] ) ] --指定数据文件中的数据如何排序
21 [ [ , ] ROWS_PER_BATCH = rows_per_batch ]
22 [ [ , ] ROWTERMINATOR = ‘row_terminator‘ ] --标识分隔行的符号
23 [ [ , ] TABLOCK ] --指定为大容量导入操作持续时间获取一个表级锁
24 [ [ , ] ERRORFILE = ‘file_name‘ ] --指定用于收集格式有误且不能转换为 OLE DB 行集的行的文件。
25 )]
1 public void InsertTwo()
2 {
3 Console.WriteLine("使用Bulk插入的实现方式");
4 Stopwatch sw = new Stopwatch();
5 DataTable dt = GetTableSchema();
6
7 using (SqlConnection conn = new SqlConnection(Conn))
8 {
9 SqlBulkCopy bulkCopy = new SqlBulkCopy(conn);
10 bulkCopy.DestinationTableName = "student";
11 bulkCopy.BatchSize = dt.Rows.Count;
12 conn.Open();
13 sw.Start();
14
15 for (int i = 0; i 1000000; i++)
16 {
17 DataRow dr = dt.NewRow();
18 dr["name"] = "蔑儿乞人" + i;
19 dr["age"] = i;
20 dr["createDate"] = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
21 dt.Rows.Add(dr);
22 }
23 if (dt != null && dt.Rows.Count != 0)
24 {
25 bulkCopy.WriteToServer(dt);
26 sw.Stop();
27 }
28 Console.WriteLine(string.Format("插入{0}条记录共花费{1}毫秒，{2}分钟", 1000000, sw.ElapsedMilliseconds, GetMinute(sw.ElapsedMilliseconds)));
29 }
30 }
31 public DataTable GetTableSchema()
32 {
33 DataTable dt = new DataTable();
34 dt.Columns.AddRange(
35 new DataColumn[] {
36 new DataColumn("name",typeof(string)),
37 new DataColumn("age",typeof(int)),
38 new DataColumn("createDate",typeof(DateTime ))});
39 return dt;
40 }
方式3：insert into
INSERT INTO Product(name,age,createDate)
SELECT ‘托多1‘1,‘2019-4-11‘,
UNION ALL
SELECT ‘托多2‘2,‘2019-4-11‘,
UNION ALL
......
四、拼接sql
1 INSERT INTO student(name,age,createDate)VALUES
2 (‘牛栏1段‘,160,‘2019-4-11‘)
3 ,(‘牛栏2段‘,260,‘2019-4-11‘)
4 ......