timestamp

问题 I created a listview with two textviews, i want to get the date and time specific to any data added to the database into the textview from firebase. Is there any method to achieve the aforementioned? Thanks. 回答1: You need to add another child to store the timestamp when saving the data. Your data structure should look something like this "data": { "id1": { "text": "some text", "timestamp": 1472861629000 }, "id2": { "text": "some text", "timestamp": 1472861629000 }, "..." } To save the

问题 I have a table called 'ratings' which contains an index which is a unique ascending number, ProductId which is a product code, rate1 to rate5 are the number of times each product has recieved a 1 or 5 star rating by a customer aveRate is the average rating for each product and lastSubDate should be the timestamp of when the last review for each product was submitted but it's currently empty. id ProductId rate1 rate2 rate3 rate4 rate5 aveRate lastSubDate 18 9996637 0 0 0 0 1 5 0000-00-00 00:00

问题 I just tried to insert two rows with the current datetime and then calculated the elapsed time since that date. Here are the rows from my table after two insertions and using NOW() function to set the timestamp: mysql> select * from pendingActivations; +--------+------------+---------------------+ | userId | code | timestamp | +--------+------------+---------------------+ | 2 | aaa | 2010-08-23 17:04:02 | | 2345 | alkfjkla23 | 2010-08-23 16:59:53 | +--------+------------+---------------------

问题 I'm trying to work with timestamp. I've defined in the jsp a hidden var from a bean. <form:input type="hidden" path="timeStamp" /> private Timestamp timeStamp; public final Timestamp getTimeStamp() { return (timeStamp == null) ? null : (Timestamp) timeStamp.clone(); } public final void setTimeStamp(Timestamp timeStamp) { this.timeStamp = (timeStamp == null) ? null : (Timestamp) timeStamp.clone(); } The Timestamp is generated in the insert operation, and I need it for the delete op. My problem

问题 One of my column needs to be transformed into a date field. It contains a value that gives the YYMM and it should be translated into the last day of that month: For example, 1312 should become 12/31/2013. I have tried various last_day, to_char functions but not able to convert 1312 in a date format. Please help !! 回答1: Netezza is based on Postgres, so maybe the Postgres method will work. Here is Postgres code that works (see here): select to_date('1312'||'01', 'YYMMDD') + interval '1 month' -

问题 I have a booking system where users can book a room at any time, and for any number of continuous days. The booking is charged depending on the number of minutes the room is in use. In the booking system, the start and end time is represented by two timestamps. e.g. start_time = 1397124000 end_time = 1397129400 From this I can calculate the number of seconds booked, and therefore calculate a charge. The problem I have is that I'd like to calculate a 50% discount on any bookings made out of

问题 I have a unix epoc time as 1571205166751 I want to convert it to date time in millisecond The desired result should be 2019-10-16 05:52:46:751 AM But using following code I am getting the result as 2019-10-16 05:52:46, not the millisecond part. import time time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(1571205166)) How to get the millisecond part while converting ? P.S. I want to covert epoch time, not any other format. 回答1: Use datetime.datetime.fromtimestamp epoch_time = 1571205166751 dt =

问题 My dataframe has column-names Timestamp, es and looks like: Timestamp es 2015-04-01 09:07:42 31 2015-04-01 09:08:01 29.5 2015-04-01 09:15:03 18.5 2015-04-01 09:15:05 8.8 2015-04-01 09:15:09 9.6 The time runs till 15:30:30 (around 12000 es data points against each timestamp a day) and the corresponding es. Does R have some function in some package or code to average the es of all the timestamps within half hour. Sample output should look like: 2015-04-01 09:30:00 Value(Average of all es from 9

问题 I have got a table that is a result of a (My)SQL query. In this table I have the post creation timestamp and the user comment creation timestamp. The trick is that not all posts have a comment (so some comment_creation are NULL). I would like to order the rows according of the most recent creation time of the post or user comment. How can I get the max(post_creation, comment_creation) of each row and order them ( DESC order)? Thanks for all contribution. 回答1: Based on your previous question,

问题 Is this valid? <?php $timestamp = mysql_query("INSERT INTO column1 (entry1, entry2) VALUES ('$entry1', '$entry2') AND SELECT timestamp"); ?> timestamp is a mysql column which generates a timestamp upon row creation. e.g. -do I need to specify creation of "timestamp" row? (I think it is okay, configured to do it on its own) -can these two actions be executed within the same query? if not, how can I do it? I want to make sure that I get the timestamp, as I use it later in the code also as a