database - 查询最后一天、上周、上个月SQLite

Question

我的 Android SQLite DB 中有这张表：

CREATE TABLE statistics (subject TEXT, hits INTEGER, fails INTEGER, date DATE)

Ondate字段存储datetime('now', 'localtime')在每个寄存器中。

现在我必须查询最后一天、上周和上个月的寄存器以显示一些统计数据。我一直在尝试这样的事情

    SELECT Timestamp, datetime('now', '-1 week') FROM statistics WHERE TimeStamp < datetime('now', '-1 week') 

和这个

    SELECT * FROM statistics WHERE date BETWEEN datetime('now', localtime') AND datetime ( 'now', '-1 month')

并且不起作用:(

我该怎么做？

我可以通过在虚拟设备模拟器中简单地转发日期来检查查询是否正常吗？

谢谢！

Answer 1

我找到了这个解决方案。我希望这个对你有用。

最后一天：

SELECT * FROM statistics WHERE date BETWEEN datetime('now', 'start of day') AND datetime('now', 'localtime');

上周：

SELECT * FROM statistics WHERE date BETWEEN datetime('now', '-6 days') AND datetime('now', 'localtime');

上个月：

SELECT * FROM statistics WHERE date BETWEEN datetime('now', 'start of month') AND datetime('now', 'localtime');

Answer 2

这段代码应该能让你上个月

SELECT * 
FROM statistics 
WHERE date >= date('now','start of month','-1 month')
AND date < date('now','start of month')

Answer 3

SELECT * 
FROM statistics 
WHERE date >= date('now','start of month','-1 months')
AND date < date('now','start of month')

在更多的月份，是“月份”，而不是像其他人之前所说的月份。

Answer 4

SELECT 
max(date(date, 'weekday 0', '-7 day')) WeekStart,
max(date(date, 'weekday 0', '-1 day')) WeekEnd,date 
FROM table;

Answer 5

这段代码有望带来前一周的记录

SELECT  * FROM  order_master
WHERE strftime('%Y-%m-%d',om_date) >= date('now','-14 days') AND 
strftime('%Y-%m-%d',om_date)<=date('now') order by om_date LIMIT 6

Answer 6

您可以创建一个日历，然后从中获取时间戳

final Calendar todayCalendar = Calendar.getInstance();
final long todayTimestamp = todayCalendar.getTime().getTime();
todayCalendar.add(Calendar.DAY_OF_YEAR, -7);
final long aWeekAgoTimestamp = todayCalendar.getTime().getTime();
final String selection = TABLE_COLUMN_DATE_CREATED + " BETWEEN " + aWeekAgoTimestamp + " AND " + todayTimestamp;