用SQL语句来实现CRUD操作:
1、添加数据:
db.execSQL("insert into Book(name,author,pages,price) values(?,?,?,?)",new String[] {"The Dan","dan","454","16.99"});
2、更新数据:
db.execSQL("update Book set price = ? where name = ?",new String[] {"10.99","The Dan"});
3、删除数据:
db.execSQL("delete from Book where pages > ?", new String[] {"500"});
4、查询数据:
db.rawQuery("select * from Book",null);