datetime

问题 I am working on a project that has rows in the database that contains a date. I want to echo the data for the fields that have a date that is equal or greater to today. I have looked at other post and tried a lot of different methods and have yet to succedd. Currently what I have returns an error when I do >= but when I just do = with the statement below, I get all rows from the database. $sql = "SELECT * FROM drives WHERE ddest = '{$trimmed}' AND 'leave_date' => DATE_FORMAT(CURDATE(), '%m/%d

问题 I am working on a project that has rows in the database that contains a date. I want to echo the data for the fields that have a date that is equal or greater to today. I have looked at other post and tried a lot of different methods and have yet to succedd. Currently what I have returns an error when I do >= but when I just do = with the statement below, I get all rows from the database. $sql = "SELECT * FROM drives WHERE ddest = '{$trimmed}' AND 'leave_date' => DATE_FORMAT(CURDATE(), '%m/%d

问题 I am working on a project that has rows in the database that contains a date. I want to echo the data for the fields that have a date that is equal or greater to today. I have looked at other post and tried a lot of different methods and have yet to succedd. Currently what I have returns an error when I do >= but when I just do = with the statement below, I get all rows from the database. $sql = "SELECT * FROM drives WHERE ddest = '{$trimmed}' AND 'leave_date' => DATE_FORMAT(CURDATE(), '%m/%d

问题 My API sending me date string in UTC like 2/20/2016 11:45 AM. For displaying date in my timezone, I am converting date from UTC to Local time zone like below code let sourceDateString = "12/20/2016 11:45 AM" let formatter = DateFormatter() formatter.dateFormat = "MM/dd/yyyy hh:mm a" formatter.timeZone = TimeZone(identifier: "UTC") let date = formatter.date(from: sourceDateString) print(date) formatter.timeZone = NSTimeZone.local formatter.dateFormat = "MMM dd,yyyy hh:mm a" let strDate =

问题 My API sending me date string in UTC like 2/20/2016 11:45 AM. For displaying date in my timezone, I am converting date from UTC to Local time zone like below code let sourceDateString = "12/20/2016 11:45 AM" let formatter = DateFormatter() formatter.dateFormat = "MM/dd/yyyy hh:mm a" formatter.timeZone = TimeZone(identifier: "UTC") let date = formatter.date(from: sourceDateString) print(date) formatter.timeZone = NSTimeZone.local formatter.dateFormat = "MMM dd,yyyy hh:mm a" let strDate =

问题 I wanted to have your opinion on what is the best way to manage time series in c# according to you. I need to have a 2 dimensions matrix-like with Datetime object as an index of rows (ordered and without duplicate) and each columns would represent the stock value for the relevant Datetime. I would like to know if any of those objects would be able to handle missing data for a date: adding a column or a time serie would add the missing date in the row index and would add "null" or "N/a" for

问题 I have written code which plots the past seven day stock value for a user-determined stock market over time. The problem I have is that I want to format the x axis in a YYMMDD format. I also don't understand what 2.014041e7 means at the end of the x axis. Values for x are: 20140421.0, 20140417.0, 20140416.0, 20140415.0, 20140414.0, 20140411.0, 20140410.0 Values for y are: 531.17, 524.94, 519.01, 517.96, 521.68, 519.61, 523.48 My code is as follows: mini = min(y) maxi = max(y) minimum = mini -

问题 I called method: TimeZoneInfo.ConvertTimeFromUtc(DateTime.Now.ToUniversalTime(), TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time")) // UTC+0 It is returned DateTime for one hour larger than the correct DateTime. Why? How will it fix? Returned value should be equal DateTime.Now.ToUniversalTime() 回答1: UTC is equal to GMT. But currently we're in BST due to summer, which is GMT + 1. GMT Standard Time automatically adjusts for daylight savings. Use Greenwich Standard Time , rather than GMT

问题 I wish to have a specific format for my DateTime depending on the current culture. So I try this: dateTime.ToString("dd/MM/yyyy hh:mm"); This is partially OK, the / gets replaced by the culture-specific separator. But the day and month order are not switched (like MM/dd) depending on the culture. Using .ToString("g") works, but that doesn't include the leading zero. How do I accomplish this? 回答1: I think this will do what you want: System.Globalization.DateTimeFormatInfo format = System

问题 I've got a dataframe of pandas with a series of dates (all Sundays) like this: Date Year Week 2011-01-02 2011 52 2011-01-23 2011 3 2011-01-23 2011 3 2011-01-30 2011 4 2011-01-30 2011 4 The week is given by df['Date'].dt.week , and what I want is set Sundays as the first day of the week, so I can get: Date Year Week 2011-01-02 2011 1 2011-01-23 2011 4 2011-01-23 2011 4 2011-01-30 2011 5 2011-01-30 2011 5 How can I do that in the simplest way? P.S. I have failed to mention that there're