在SQL Server中插入批量记录

Question

Can anybody tell me how to bulk insert data into SQL Server under a transaction? I have a program to import data into multiple tables of a database from a file. I am using SQL Server and Entity Framework to import those records into the database under a transaction. Please tell me is it good way to follow?

I am using Entity Framework for this. But when I import 1000 records, I found it causes locks on SQL Server.

The file contains many columns. Few columns belongs to parent table and the rest of columns belongs to child tables. So how could we map them using SqlBulkCopy ?

There are 10 child tables. I need to insert data from file to child tables first. If insertion of records cause error in child table for some what reason I will have to rollback that transaction and continue with another record from file

Answer 1

Today i found a good library for bulk insert: EntityFrameworkETL

PM> Install-Package EntityFrameworkETL

Project Description Entity Framework ETL is used to batch commands using an existing DbContext. This is useful when moving data between production and development.

Example Usage

ETL = new EntityFrameworkETL.ETL(() => new DataContext("name=source"), () => new DataContext("name=target"));
ETL.DeleteAll<Person>();
ETL.BatchInserts<Person>(100, true, x => x.Include("Jobs").Where(y=> y.Age > 65 && y.IsRetired));

Answer 2

This type of operation would work best as a stored procedure. Otherwise you will multiple back SQL calls.

Basically you create a stored procedure that accepts a user-defined type, and operate on passed data.

This post has some info on how to do this.