Android SQLite Query - Getting latest 10 records

Question

I have a database saved in my Android application and want to retrieve the last 10 messages inserted into the DB.

When I use:

Select * from tblmessag         


        

Answer 1

on large databases, the ORDER BY DESC statement really might slow down the system, e.g. raspberry pi. A nice approach to avoid ORDER BY is the OFFSET command. And you even keep the stored order:

SELECT * FROM mytable LIMIT 10 OFFSET (SELECT COUNT(*) FROM mytable)-10;

see: http://www.sqlite.org/lang_select.html

check out your performance with:

.timer ON