删除查询不工作sqlite

Question

我正在创建一个应用程序,其中我使用了sqlite db.I已成功创建表并将数据插入其中.但是当我尝试删除数据时,查询似乎不起作用.

码

public void deleteSubject(int Id) {
        String query = "DELETE  FROM " + TABLE_NAME + " WHERE " + DataBaseColumns.SUBJECT_ID + "=" + Id;
//        String whereClause = DataBaseColumns.SUBJECT_ID + "=?";
        database = openDb();
        Cursor cursor = null;
        try {
//            result = database.delete(TABLE_NAME, whereClause, new String[Id]);
            cursor = database.rawQuery(query, null);
        } catch (SQLiteException e) {
            Log.e("Error in delete Subjects", e.getMessage());
        }
        database = closeDb();
        cursor.close();


    }

Answer 1

使用execSQL(),而不是rawQuery()用于DELETE查询.

rawQuery()只编译SQL但在移动光标之前不运行它. execSQL()编译并运行SQL.