sqlite之query、rawQuery区别；moveToNext，moveToFirst区别原创

Android App使用SQLite数据库的一些要点总结 · 当执行`query()`或`rawQuery()`后，会返回一个`Cursor`对象，它是遍历查询结果的主要工具 ...

SQLiteDatabase对象提供了执行SQL命令的方法，如execSQL()用于执行不返回结果的SQL命令，rawQuery()用于执行返回结果集的SQL命令，insert()、update()、 ...

RawQuery methods must return a non-void type. If you want to execute a raw query that does not return any value, use RoomDatabase#query methods.

rawQuery(指令,null)。 // //Sql_CRUD public void createText(String text){ //按照你SqlDBHelper設定的屬性去添加ContentValues values = new ContentValues ...

RawQuery(String, String[], CancellationSignal). Runs the provided SQL and returns a Cursor over the result set.

I'm trying to use rawQuery to return a cursor with a few different rows of data to be passed into it. When there is only 1 argument it works.

I want to use select query for retrieving data from table. I have found, rawQuery(query, selectionArgs) method of SQLiteDatabase class to retrieve data.

Let's create a simple application which will make a query from two tables and display the result in logs. Tables' names will be people and position.

rawQuery does not work on any condition. It is used when large amount of data is to be returned. It executes SQL query. It takes it's first ...