getReadableDatabase(): creates or opens a database for reading only.ĬontentValues allows key/value pairs to be declared consisting of table column identifiers and the values to be stored in each column.getWritableDatabase(): opens or creates a database for reading and writing.onOpen(): called when the database is opened.

onUpgrade(): called in the event that the application code contains a more recent database version number reference.onCreate(): called when the database is created for the first time.SQLiteOpenHelper is designed to make it easier to create and update databases. rawQuery(): executes an SQL query statement and returns matching results in the form of a Cursor object.execSQL(): executes a single SQL Statement that does not return result data.query(): performs a specified database query and returns matching results via a Cursor object.delete(): deletes rows from a database table.insert(): inserts a new row into a database table.SQLiteDatabase provides the primary interface between the application code and underlying SQLite database. get() (such as getInt(), getDouble(), so on): returns the value of the specified contained at the specified column index of the row at the current cursor position.move(): moves by a specified offset from the current position in the result set.moveToNext(): moves to the next row in the result set.moveToLast(): moves to the last row in the result set.moveToFirst(): moves to the first row in the result set.getCount(): returns the number of rows contained within the result set.close(): release all resources used by cursor and close it.Android SQLite Java ClassesĬursor: a class provides access to the results of a database query. Like other RDBMSs, data is accessed in a SQLite database by using Structured Query Language (SQL). are standalone server processes, then SQLite is embedded because it is provided in the form of a library that is linked in applications. If most RDBMSs such as MySQL, Oracle, etc. SQLite is a relational database management system (RDBMS).

Android null android studio sdk manager