Using Databases in the RememberHack Week 5

Databases Organized collection of data Intended to organize, store, and retrieve large amounts of data easily Examples:

Organized Information Lists  Ordered data  Example: phone tree Maps/Dictionaries  Key/Value pair  Example: phone book Flat-file databases  Many categories  Example: address book Relational databases  Categories across files  Example: Facebook

Data Key – label for what’s inside Value – data that’s inside Example:  Key = your name  Value = your school name

Databases in App Inventor TinyDB stores data directly on the phone and will only used by that phone TinyWebDB stores data on a web datebase that can be shared among phones

TinyWebDB Accessed through the web ServiceURL Store key – put into DB Retrieve key – get value out of DB

TinyWebDB

Remember Hack

Resources If you have problems Read the App Inventor book on databases (pages ) Post questions to the Technovation Challenge Google Group

Reminder: Weekly Reflections What did your team like about this week? What challenges did your team have this week? Anything else your team would like to share?

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