sql - How to get timestamp as timestamp from postgres? -


I want to get data from postgraduate. There is a column in the type timestamp without the timezone, the simple selection gives me a formatted date, but I just want a timestamp in milliseconds, how can I do it in SQL?

"post-text" itemprop = "text"> 
  Select (era from my_timestamp)

This gives time in seconds though, it After decimals of decimal number is the decimal number with decimal number.

Remove 
  (era from my_timestamp) * 1000

Test: 

  select my_date, remove (era from my_date) * Timelapse 'GMT'

Note on precision

at interval '1s' + 'epoch' :: time zone returns a "double exact" number, which fits in 15 digits in postgres. This means that around 2016 (as I write), the actual accuracy is 10 microsounds. Note how it closes the final digit: 

  Remove selection ('2016-09-20T11: 22: 33.456789Z': 'era' from the timestamp); Date_part ------------------ 1474370553.45679 (1 line)

For the dates of the future of 270 years, this data type is only 100- Microsoft seems like a decent precision from 2016's perspective of being able to represent precision, and I think some things may change before reaching that year. 

  Remove Selection ('2290-09-20T11: 22': 33.456789Z ':: Timestamp from' Era '); Date_part ------------------ 10120 9 36953.4568 (1 line)

By any means, it is fine for milliseconds Will continue to work for some time accurate.


-

Comments

Post a Comment

Popular posts from this blog

google indexing -

I have a question, how can I get results of similar Google results like Wikipedia, MySpace ... When you search Wikipedia on Google, you have the result of an input search for Wikipedia, which is user-friendly. When you search MySpace on Google, you have Google results below, some links: login, register, sign up, search ... I actually do this on Google for my website Want a kind result? Thank you. itemprop = "text"> create a sitemap: Custom Search Engine Create: Thanks Google!
Read more

wpf - Custom Message Box Advice -

Well, I'm using a custom window box that comes with some custom control boxes that accompany the text The producers who are displayed are called. I have a defined event, which has been subscribed through the original class, it gets burnt when clicking on the button. However, I can not see how to use it effectively, I would like to return one yes, whether yes or not, but obviously my code will continue to execute, so this Below is some example code to clarify the problem that the method has subscibed by clicking on the button. Message box window Public partial class custom message box: window {public representative message messagebox object sender, event events e); Public event messagebox handler messagebox document; Public Customs Box () {Initial group (); } Public Customsbox (String Message) {InitializeComponent (); This.txtdescription.Text = Message; } Public Customsbox (String Message, String Title, String First BTNtext) {Initialization (); This.lbltitle.Content =...
Read more

Eclipse CDT variable colors in editor -

I hope this is a good question to ask here. This programming is related, so I thought it would be better than the superuser, so I am using the CDT C ++ Eclipse plugin. I know how the editor changes colors for some things But is there a way to do that all the variables are different colors? For example in KDEValue, it sets the local variables and square variables in different colors and bold square squares. Can I copy it to CDT? Eclips provides some level of color customization for text editor syntax You can see it on the following: There are many elements, including the Window> Preferences> C / C ++> Editor> Syntax color code that can be changed, assembly, Comments, Preprocessor and Doxian Under the code, it is possible to change the color of some variable types, such as global variables, local variable announcements, local variable references, and parameter variables. But I do not think the code is capable of changing the color of each variable declared....
Read more