C# 将唯一记录从datatable导入sql表
我有一个与MS Sql表结构相匹配的datatable,我想将新记录从datatable导入Sql 因此,在下面的示例中,我希望为Jim导入记录 数据表:C# 将唯一记录从datatable导入sql表,c#,sql,ado.net,datatable,dataset,C#,Sql,Ado.net,Datatable,Dataset,我有一个与MS Sql表结构相匹配的datatable,我想将新记录从datatable导入Sql 因此,在下面的示例中,我希望为Jim导入记录 数据表: Name DOB Country Brian 11-11-78 USA Dave 01-01-80 UK Jim 02-02-81 FR Name DOB Country Brian 11-11-78 USA Dave 01-01-80 UK SQL: Name
Name DOB Country
Brian 11-11-78 USA
Dave 01-01-80 UK
Jim 02-02-81 FR
Name DOB Country
Brian 11-11-78 USA
Dave 01-01-80 UK
SQL:
Name DOB Country
Brian 11-11-78 USA
Dave 01-01-80 UK
Jim 02-02-81 FR
Name DOB Country
Brian 11-11-78 USA
Dave 01-01-80 UK
您可以创建SP,并传递数据表中的值,并用于执行插入/更新: 根据数据进行修剪,假设SQL表的名称为
\u DOB
:
MERGE INTO _DOB AS Target
USING (--SELECT NAME,DOB,COUNTRY FROM FROM YOUR DataTable
VALUES ('Jim','1978-11-11', 'FR')
)
AS Source (Name, DOB, Country)
ON
Target.Name = Source.Name
AND Target.DOB = Source.DOB
WHEN MATCHED THEN
UPDATE SET
Target.Name = Source.Name,
Target.DOB = Source.DOB,
Target.Country = Source.Country
WHEN NOT MATCHED BY TARGET THEN
INSERT (Name, DOB, Country)
VALUES (Source.Name, Source.DOB, Source.Country);
这就是我的结局,它似乎起到了作用。谢谢大家的意见
this.conn = new oleDbConnection(ConfigurationManager.ConnectionStrings["Connection"].ConnectionString);
OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM name", conn);
DataSet ds = new DataSet();
adapter.Fill(ds, "name");
DataTable data = ds.Tables["name"];
sqlCommand = "CREATE TABLE ##TempTable(Name, DOB, Location)";
SqlConnection SQLconn = new SqlConnection(ConfigurationManager.ConnectionStrings["Connection1"].ConnectionString);
SQLconn.Open();
using (SqlCommand cmd = new SqlCommand(sqlCommand, SQLconn))
{
cmd.CommandType = CommandType.Text;
cmd.ExecuteReader();
SqlBulkCopy bulkCopy = new SqlBulkCopy(ConfigurationManager.ConnectionStrings["Connection"].ConnectionString);
// Map the columns
foreach (DataColumn col in data.Columns)
bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName);
bulkCopy.DestinationTableName = "##TempTable";
bulkCopy.WriteToServer(data);
}
string MergeCommand = string.Concat("insert into [Existing Table] (Name, DOB, Location) ",
"select distinct Name, DOB, Location from ##TempTable ",
"WHERE NOT EXISTS (SELECT 1 FROM [Existing Table] a WHERE a.[Name] = ##TempTable.[Name] and a.[DOB] = ##TempTable.[DOB])");
SqlConnection Mergeconn = new SqlConnection(ConfigurationManager.ConnectionStrings["Connection"].ConnectionString);
Mergeconn.Open();
using (SqlCommand MergeCmd = new SqlCommand(MergeCommand, Mergeconn))
{
MergeCmd.CommandType = CommandType.Text;
MergeCmd.ExecuteReader();
}
SQLconn.Close();
Mergeconn.Close();
表上的主键是什么?您可以将原始数据库中的所有记录导入临时表,然后执行合并(SQL Server)。对不起,我没有PK。我计划结合使用Name和DOB来区分。另外,看看Microsoft Sync Framework()不需要存储过程,只需将数据大容量复制到临时表中,然后使用MERGE语句(如上所示)来更新目标。这应该比单独合并每一行更有效。根据数据大小和操作频率,这可能是一种选择。