Android原始查询问题

Question

我有一个数据库，其中有一列以毫秒为单位的日期。我正在尝试执行一个查询，它允许我只检索大于当前系统时间的日期，并按升序排列。

这就是我所做的，但它似乎没有用，帮助会非常感激。

    long lowestDate = 0;
    long currentTime = System.currentTimeMillis(); 
    String CT = Long.toString(currentTime);
    String[] args = {CT};
    mDb = mDbHelper.getReadableDatabase();
    String mySQL =   " select dt" 
                   + " from reminders"
                   + " where dt > " + args[0]
                   + " orderby dt Asc ";
    Cursor c1 = mDb.rawQuery(mySQL, null);

Answer 1

String mySQL =   " select dt" 
                   + " from reminders"
                   + " where dt > " + System.currentTimeMillis()
                   + " order by dt Asc ";

“排序依据”而不是“orderby”，长串拼接是自动的。

Answer 2

 long lowestDate = 0;
    long currentTime = System.currentTimeMillis(); 
    String CT = Long.toString(currentTime);
    String[] args = {CT};
    mDb = mDbHelper.getReadableDatabase();
    String mySQL =   " select dt" 
                   + " from reminders"
                   + " where dt > '" + args[0]
                   + "' orderby dt Asc ";
    Cursor c1 = mDb.rawQuery(mySQL, null);

试试这个

Answer 3

尝试

 String mySQL =   "select dt" 
                       + " from reminders"
                       + " where dt > '" + args[0]
                       + "' orderby dt Asc";