C＃-SQL插入和更新速度

Question

I have a CSV file of about 80,000 rows and I am trying to process it in a C# application and make necessary changes to my SQL database. I read the CSV in to the application which doesn't take long then I process it from there.

For each of the records from the CSV I either insert a new record or update an existing one in the database based on a condition(from a SQL select statement). I am just using C# inline SQL commands to do my selects, updates, and inserts. This process is taking about 40 minutes to complete.

I was wondering if there are any best practices for large SQL database updates and insertions that will be able to make the process quicker.

Thanks in advance!

Answer 1

Use begin transaction (before) and commit (after all the work). If you don't explicitly start a transaction, for each of your commands, SQL will implicitly start a transaction and finish it, delaying the process (so 80k rows mean 80k separate transations, whereas all commands should run in one transaction.).

Answer 2

This is the best that I've used.

http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlbulkcopy.aspx

Very very fast.

Answer 3

You should try to use backgroundWorker... It helped me when I had to make large queries...

How to use BackgroundWorker