` @DatabaseTable(tableName = "users") public class User { } ` ` @DatabaseField(columnName = "id", dataType = DataType.INTEGER, defaultValue = "0", canBeNull = false) private int id; ` ` @DatabaseField(columnName = "id", dataType = DataType.INTEGER, defaultValue = "0", canBeNull = false) @PrimaryKey private int id; ` ` @DatabaseField(columnName = "user_id", dataType = DataType.INTEGER, defaultValue = "0", canBeNull = false) @ForeignField(foreignFieldName = "id", foreignDataType = DataType.INTEGER, foreignColumnName = "id", foreignTableClass = User.class) private int userId; ` ` User user = new User(); user.setName("John"); user.setAge(25); user.insert(); ` ` List<User> userList = new Select().from(User.class).queryForAll(); ` ` User user = new Select().from(User.class).where("name = ?", "John").executeSingle(); user.setAge(30); user.update(); ` ` User user = new Select().from(User.class).where("name = ?", "John").executeSingle(); user.delete(); ` ` DatabaseConfiguration configuration = new DatabaseConfiguration(context, "myDatabase.db", 1); ` ` DatabaseHelper helper = new DatabaseHelper(context, configuration); ` ` DBToolsImpl dbTools = new DBToolsImpl(helper); `