Tutorial: App Inventor database programming with SQLite introduction

An introduction to App Inventor programming with SQLite database.
The .aia files for this tutorial are available at https://play.google.com/store/apps/details?id=appinventor.ai_peter_thomson_com.App_Inventor_tutorials_using_SQLite
When you first run the app it will copy the .aia files for all the SQLite tutorials from its Assets folder to the Download folder on your SDcard. This also includes the Handbook app and a copy of the transcript of this video series on SQLite databases with App Inventor.
The four sql queries in this example are all the same sql, but the parameters change..
select TradeValue from comtrade where reporter = ? and partner = ? and TradeFlow =?