sqlitedatabase query

Android provides a class named SQLiteDatabase, which encapsulates APIs for database operations. This class can be used to Create, query, and Update data) and Delete operations (CRUD ). For SQLiteDatabase learning, we should master the execSQL () and

Android-use SQLiteDatabase to operate SQLite DatabasesIn addition to using files or SharedPreferences to store data, you can also choose to use the SQLite database to store data. On the Android platform, an embedded relational database-SQLite is

Recently I am looking at the source code of the Android platform. Next I will summarize the relationship between sqlitedatabase and its underlying sqllite database. How does the upper-layer sqlitedatabase call the underlying SQLite database

Sqliteopenhelper is a help class for sqlitedatabse to manage data creation and version updates. The general usage is to define a class that inherits sqliteopenhelper and implement two callback Methods: oncreate (sqlitedatabase dB) and onupgrade

Sqliteopenhelper Introduction:Sqliteopenhelper is an excuse! So you can't instantiate it directly! We need to implement this interface if we want to get the Sqliteopenhelper Object! Create an implementation class object for this interface!This

After learning the basic knowledge of the Sqlite database today, I will record what I learned for later reference. The following is my summary of the Sqlite database:1. Sqlite IntroductionSqlite is a lightweight database that is contained in a

Sqlitedatabase object's query () interface: Public Cursor query (string table, string[] columns, string selection, string[] Selectionargs , string groupBy, String having, string orderby,string limit)Query the given table, returning a over the Cursor

First, the query operation:Query operation is more complex, the following operations are mainly:1 db.rawquery (String sql, string[] selectionargs); 2 db.query (string table, string[] columns, string selection, string[] Selectionargs, String

The SQLite database is a built-in database of Android, small and powerful enough to work with most SQL statements, while SQLite databases are just files. Although SQLite is a bit much, but not as powerful as the PC-side MySQL, and the Android system

1. Sqlitedatabase object's query () interface:Public CursorQuery(string table, string[] columns, string selection, string[] Selectionargs,string groupBy, string having,string orderby,string limit)Query the given table, returning a over the Cursor