Question

如何在两个日期时间列之间查询行？

我的示例表：

 message     |      startdatetime           |      enddatetime
--------------------------------------------------------------------------------
Hi           |   2013-04-09 10:00:00       |    2013-04-09 10:30:00

Good morning |   2013-04-09 10:40:00       |    2013-04-09 10:50:00

我的查询：

fromDateTime =“2013-04-09 10:00:00”; toDateTime =“2013-04-09 10:50:00”;

c1 = myDB.rawQuery("select * from masterdatatable where number=? and startdatetime >= datetime(?) and enddatetime <= datetime(?) order by enddatetime, new String[]{imei,fromDateTime,toDateTime});

此处如果传递fromDateTime="2013-04-09 10:00:00 " and toDateTime="2013-04-09 10:50:00 "此查询正确地返回上述两个记录。

但是如果我传递fromDateTime="2013-04-09 10:05:00 "; toDateTime="2013-04-09 10:20:00 "，则此查询返回空光标。实际上我希望这个查询返回第一行。怎么做到这一点？

Answer 1

我是通过以下方法实现的，

Cursor c0 = myDB.rawQuery("select startdatetime from masterdatatable where datetime(?) >= startdatetime and  datetime(?) <= enddatetime order by startdatetime asc limit 1", new String[]{fromDateTime,fromDateTime});

String fromDate1=fromDateTime;
if(c0.moveToFirst())
{
    fromDate1 = c0.getString(0);
}

Log.i("date", "fromDate1->"+fromDate1);

Cursor c01 = myDB.rawQuery("select startdatetime from masterdatatable where datetime(?) >= startdatetime and  datetime(?) <= enddatetime order by startdatetime desc limit 1", new String[]{toDateTime,toDateTime});
String fromDate2=toDateTime;
if(c01.moveToFirst())
{
    fromDate2 = c01.getString(0);
}

Log.i("date", "fromDate2->"+fromDate2);

c1 = myDB.rawQuery("select * from masterdatatable where startdatetime  between datetime(?) and datetime(?)  order by enddatetime, new String[]{fromDate1,fromDate2});

Answer 2

由于你的条件，它不会返回第一行..第一行的endTime不是

 2013-04-09 10:30:00 doesn't

小于

 toDateTime="2013-04-09 10:20:00

因为你没有得到第一行......

<强>更新如果您仍想返回第一行，则可以创建新查询这将检查startDate是否在给定输入之间..

Answer 3

尝试使用以下SQL查询

select * from masterdatatable 
where number=? 
and fromdate between startdatetime and enddatetime 
and todate between startdatetime and enddatetime
order by enddatetime

如何在两个日期时间列之间查询行？

3 个答案: