Question

I have more than 5000-6000 records in SQLite table. When I delete this all records it takes very long time and causes screen pause and starts releasing resources.

I tried it with AsyncTask but still the same problem. So can anyone tell how should I delete this thousands of records without blocking app.

Answer 1

I am no expert to Sqlite but in general there are 3 ways to do that.

1. As every body commented Truncate if you are going to delete all record.
2. If you are going to majority of the records you can store the non-delete files in tempTable and then truncate your actual table finally insert all the records from temp to actual table

3. This one is what I use most of the time. Use a Top XXX delete statement in your case you can delete 200 records in every 2min. (I am assuming you don t insert more than 200 records in 2 min). The AsyncTask is the way for that kind of approach.
   In T-SQL I use the following sql to it is up to you

   Delete From tUser
   where UserId in (
   Select top 200 UserId
   From tUser
   where LastLoggin< GetDate()-120
   )