Android Question Write to SQL Lite database but limit and replace rows

Hi,

Just wondering if anyone knows a way to only write a xx amount of items to a table in a SQL Lite database before overwriting the old rows.

For Example:
I want to write, lets say 5 rows to a table and when the 5 rows are entered in I want to start replacing the old ones.

So, lets say I add if I add
row 1 = Bob
row 2 = John
row 3 = Bill
row 4 = Harry
row 5 = Tom

Now when I add a item I want to delete Bob and add my new item to the end. So it will become:
row 1 = John
row 2 = Bill
row 3 = Harry
row 4 = Tom
row 5 = Tony

I am trying to store each in the SQL Lite database so that if you close the app and re-open it again the data is still there.

I can't seem to work out how to do this.. Anyone able to help ?