FIT2081 Lecture Notes - Lecture 7: Asteroid Family
12 Jun 2018
School
Department
Course
Professor
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Document Summary
To create table in db, must define (for eg): Autoincrement = each time new row added to table, the system will generate a new unique id for that row. Not null = if row is null, reject. + all other table columns to be included and corresponding values. Gives basic operations to access and manipulate data. Invoked only if the db you have provided doesn"t yet exist. Table is created for us and stored locally super ctor: super (context, string db_name, factory null, int db_version) factory if not null creates a special cursor onupgrade(sqlitedatabase db, int [old db ver], int [new db ver]) Last 2 params represent the versions of the db that the programmer wishes to update from and to. Invoked if the current db version is lower than the one stated in the class (i. e. db_version value has been incremented, so db needs to be updated) Updates db to new version specified in db_version.
