临时表：Test
/****** 对象: Table [dbo].[Test] 脚本日期: 05/10/2013 11:42:07 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[Test]( [ID] [int] IDENTITY(1,1) NOT NULL, [UserID] [int] NOT NULL, [UserName] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL, CONSTRAINT [PK_Test] PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY] ) ON [PRIMARY]
临时表的触发器：tri_edit
CREATE TRIGGER [tri_edit] ON [dbo].[Test] instead of insert as
declare @temp int
select @temp= inserted.UserID from inserted
--更新已经存在的主键(更新全部字段)
if(@temp IS Not NULL )
update [Test] set UserQQ=inserted.UserQQ
from [Test] join inserted on [Test].UserID=inserted.UserID
else --(更新指定的部分字段)
update [Test] set UserName=inserted.UserName
from [Test] join inserted on [Test].UserID=inserted.UserID
--插入存在的主键数据
insert [Test] (UserID,UserName)
select inserted.UserID,inserted.UserName
from inserted left join [Test] on inserted.UserID=[Test].UserID
where [Test].id is null
go
C# SqlBulkCopy方法：
/// <summary> /// SqlBulkCopy往数据库中批量插入数据 /// </summary> /// <param name="sourceDataTable">数据源表</param> /// <param name="targetTableName">服务器上目标表</param> /// <param name="mapping">创建新的列映射，并使用列序号引用源列和目标列的列名称。</param> public static void BulkToDB(DataTable sourceDataTable, string targetTableName, SqlBulkCopyColumnMapping[] mapping) { /* 调用方法 - 2013年05月10日编写 //DataTable dt = Get_All_RoomState_ByHID(); //SqlBulkCopyColumnMapping[] mapping = new SqlBulkCopyColumnMapping[4]; //mapping[0] = new SqlBulkCopyColumnMapping("Xing_H_ID", "Xing_H_ID"); //mapping[1] = new SqlBulkCopyColumnMapping("H_Name", "H_Name"); //mapping[2] = new SqlBulkCopyColumnMapping("H_sName", "H_sName"); //mapping[3] = new SqlBulkCopyColumnMapping("H_eName", "H_eName"); //BulkToDB(dt, "Bak_Tts_Hotel_Name", mapping); */
using (SqlConnection conn = new SqlConnection(DBHelper.ConnectionString))
{
//SqlBulkCopy bulkCopy = new SqlBulkCopy(conn); //用其它源的数据有效批量加载sql server表中
//指定大容量插入是否对表激发触发器。此属性的默认值为 False。
SqlBulkCopy bulkCopy = new SqlBulkCopy(DBHelper.ConnectionString, SqlBulkCopyOptions.FireTriggers);
bulkCopy.DestinationTableName = targetTableName; //服务器上目标表的名称
bulkCopy.BatchSize = sourceDataTable.Rows.Count; //每一批次中的行数
//bulkCopy.BulkCopyTimeout = 300; //超时之前操作完成所允许的秒数,大批量数量需要的时长5分钟,2013-11-6备注 报错：“超时时间已到。在操作完成之前超时时间已过或服务器未响应” 解决办法：
if (sourceDataTable != null && sourceDataTable.Rows.Count != 0)
{
for (int i = 0; i < mapping.Length; i++)
bulkCopy.ColumnMappings.Add(mapping[i]);
//将提供的数据源中的所有行复制到目标表中
bulkCopy.WriteToServer(sourceDataTable);
}
}
C# 调用BulkToDB方法：
int kk = Environment.TickCount; DataTable dt = new DataTable(); dt.Columns.Add(new DataColumn("UserID", typeof(string))); dt.Columns.Add(new DataColumn("UserName", typeof(string))); for (int k = 0; k < 10000; k++) //40000 { DataRow dr = dt.NewRow(); dr["UserID"] = k; dr["UserName"] = "8888 - " + k; dt.Rows.Add(dr); } SqlBulkCopyColumnMapping[] mapp = new SqlBulkCopyColumnMapping[2]; mapp[0] = new SqlBulkCopyColumnMapping("UserID", "UserID"); mapp[1] = new SqlBulkCopyColumnMapping("UserName", "UserName"); //提交任务表 BulkToDB(dt, "Test", mapp); int exeg = Environment.TickCount - kk; MessageBox.Show(exeg.ToString());
动态加载数据列名：
SqlBulkCopyColumnMapping[] mapp = new SqlBulkCopyColumnMapping[dt.Columns.Count]; for (int j = 0; j < dt.Columns.Count; j++) { mapp[j] = new SqlBulkCopyColumnMapping(dt.Columns[j].ColumnName, dt.Columns[j].ColumnName); }
1、--处理的触发器示例 create trigger tr_insert on 表 instead of insert --注意触发器的类型 as --更新已经存在的主键 update 表 set name=b.name,sex=b.sex from 表 a join inserted b on a.id=b.id --插入存在的主键数据 insert 表 select a.* from inserted a left join 表 b on a.id=b.id where b.id is null go —————————————————————————————————————————— 2、--触发器 CREATE TRIGGER tri_edit ON tab INSTEAD OF INSERT AS if exists(select col1,col2 from tab join inserted on tab.学号=INSERTED.学号) begin --这里面你可以加如些其他修改操作,取决于具体的功能 update tab set col1='num1' from tab join inserted on tab.学号=inserted.学号 end else insert tab select * from inserted GO
