android操作数据库

	SQLiteDatabase db = openOrCreateDatabase("testyzy.db", Context.MODE_PRIVATE, null);
    		db.execSQL("DROP TABLE IF EXISTS person");
    		//创建person表
    		db.execSQL("CREATE TABLE person (_id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR, age SMALLINT)");
    		Person person = new Person();
    		person.name = "john";
    		person.age = 30;
    		//插入数据
    		db.execSQL("INSERT INTO person VALUES (NULL, ?, ?)", new Object[]{person.name, person.age});
    		
    		person.name = "david";
    		person.age = 33;
    		//ContentValues以键值对的形式存放数据
    		ContentValues cv = new ContentValues();
    		cv.put("name", person.name);
    		cv.put("age", person.age);
    		//插入ContentValues中的数据
    		db.insert("person", null, cv);
    		
    		cv = new ContentValues();
    		cv.put("age", 35);
    		//更新数据
    		db.update("person", cv, "name = ?", new String[]{"john"});
    		
    		Cursor c = db.rawQuery("SELECT * FROM person WHERE age >= ?", new String[]{"33"});
    		while (c.moveToNext()) {
    			int _id = c.getInt(c.getColumnIndex("_id"));
    			String name = c.getString(c.getColumnIndex("name"));
    			int age = c.getInt(c.getColumnIndex("age"));
    			Log.i("db", "_id=>" + _id + ", name=>" + name + ", age=>" + age);
    		}
    		c.close();
    		
    		//删除数据
    		db.delete("person", "age < ?", new String[]{"35"});
    		
    		//关闭当前数据库
    		db.close();