sqlite equivalent of row_number() over ( partition by …?

Question

I\'d like to know if it\'s possible to do the following using a single sqlite statement:

My table looks something like this:

|AnId|UserId|SomeDate|So         


        

Answer 1

This might be prohibitively expensive (perhaps only do it when a user inserts a new record?) but how about this:

for user in users:
  user-records = select * from records where user=user
  if user-records.length > 10:
    delete from records where user=user and date

(in a mix of SQL and pseudocode)