timestamp

问题 Recently I have started working on cassandra and I have some issues dealing with cassandra timestamp using cql and Java. Below is my sample cassandra table schema. CREATE TABLE emp ( empid int, create_date timestamp, deptid int, PRIMARY KEY (empid, create_date) ) Here are my questions below: 1) Actually I need only date(I am not worried about time), In my table schema I have used timestamp datatype, Is there any datatype like date to store only date instead timestamp. 2) If there is no

问题 Im working with Google bookmakrs and it returns 16-digit timestamp that i dont seem to be able to recognize in C# to turn into real dates, any ideas? how to turn this timestamp: 1278276905502403 to something that makes sense in C#? 回答1: That looks like UNIX time in microseconds. That is, the number of microseconds since 1970.01.01 00:00:00. Could try something like: dateTime = new System.DateTime(1970, 1, 1, 0, 0, 0, 0); dateTime = dateTime.AddMilliseconds(value/1000); (Probably a better way

问题 I'm simply trying to design a database schema upgrade scheme (for a family of applications using a proprietary database). What I'd like to have is a simple way to determine that the application has been reinstalled on the phone, with a different Xcode-generated version of the app from the previous version, so that we only go through the messy upgrade logic if there's been a change. I considered simply using a timestamp of __DATE__ and __TIME__ stored in the app settings, but that captures

问题 ZPUBLICATIONDATETIME is of type TIMESTAMP . So when I do this: SELECT strftime('%d - %m - %Y ', datetime(ZPUBLICATIONDATETIME, 'unixepoch')) FROM ZTNNEWS; I get 26 - 05 - 1984 instead of 2015. iOS (Core Data) writes datetime on 1 Jan 2001 based. What is the best approach to get the right date conversion? Shall I just add 31 years to it or is there an alternative to unixepoch to put in there? Essentially what I am trying to do is to get the records from past two days: select * from ZTNNEWS

问题 It sometimes happens that two admins in our support team are trying to do the same sensitive operation on db table row (let's say, modifying the value in the row). We need to prevent that. (Row locking is not possible because tables are "myisam") I have thought of several solutions: setting the old value in the form and comparing it with the current one on submit <input name="money"><input type="hidden" name="old_money" value="10"> and then before updating: $currentmoney=value_from_query(

问题 I have this bash script that loops through the files in the current directory and extracts the date part from the filename , then uses (Unix) touch command to modify (or update) that file's modification-date ( mtime ) to this date. Filename example Electric company name - bill - 2014-03-22.pdf Bash script: I save this bash script as _save_file_mtime_from_filename.sh (add chmod +x to it) and put in the directory where I'd like to change the file's modification time. And then run it from the

问题 I've been having some troubles with TB in the last days. I have a generic variable (let's assume, for example, the external temperature), which measures are acquired at realtime using MQTT and tb-gateway. I also have the variable forecasts for a given future time period, acquired via MQTT from a Python module which performs the forecasting. I wish to plot in the same graph both the data acquired at realtime and the forecasted trend for a given time period (let's say for the next 24 hours),

问题 This quote was taken from an answer to another question about Excel Security settings. The answer proposed using a digital certificate to sign macros to resolve the security issue. Towards the end of the answer, it was noted that: "When you digitally sign macros, it is important to obtain a time stamp. . ." This is tricky in Office 2013, for a variety of reasons. First, there are two different ways to attach a signature to a spreadsheet. They are known as visible and invisible signatures. The

问题 I am trying to copy XML files from an FTP location to an application server - but not all files. New files are archived after every half an hour in the ftp location. I need to transfer only the new files based on the timestamp and date. I am currently using the below 2 files to copy all the files from FTP location. Batch file: ftp -i -s:D:\ftp_commands.txt -n <host name> Text file (ftp_commands.txt): user <username> <password> cd <source path> lcd <destination path> mget * bye Can anyone

问题 My time in mysql is in the form hh:mm:ss How can I convert that to 12 hour time and also remove the seconds, because they are all 00. ex: 14:30:00 mysql $finalresult = mysql_query("SELECT * FROM events WHERE clubID IN (" . implode(',', $clubIDs) . ") ORDER BY date ASC, TIME(startTime) ASC"); while($finalrow = mysql_fetch_assoc($finalresult)) { $originaltime = $finalrow['startTime']; $newtime = TIME_FORMAT($originaltime, '%h:%i %p'); } 回答1: Use TIME_FORMAT: SELECT TIME_FORMAT('14:30:00', '%h: