How does PostgreSQL store timestamp internally?

In case of MySQL,

TIMESTAMP values are stored as the number of seconds since the epoch (‘1970-01-01 00:00:00’ UTC)`

In case of PostgreSQL with the version less than or equal to 9.6

timestamp values are stored as seconds before or after midnight 2000-01-01

In case of PostgreSQL with the version greater than or equal to 10, there is no explanation about this

I have two questions about the internal logic of PostgreSQL.

  1. Does it still use the same standard as the version 9.6?
  2. Why "midnight 2000-01-01"? Unix epoch starts from 1970-01-01 00:00:00 UTC. J2000 epoch starts from 12 noon (midday) on January 1, 2000.

It seems like only a few systems use 2000-01-01 00:00:00.

Because PostgreSQL provides functions to convert UNIX epoch into the timestamp to_timestamp or vice versa EXTRACT(EPOCH FROM ...), using the standard that is different from UNIX epoch seems like to require additional offset calculations.

Shoes that get your epic time,A next-generation shoe store

[font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]Looking closer, this pair [/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]jordan scarpe uomo 2020[/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif] comes dressed in a Purple Pulse, Glacier Blue, Sail, and Black color combination. Constructed with suede, Glacier Blue adorns the base, covers the two, and mini Swoosh on the toe. Furthermore, Purple appears on the ankle, heel, eyestay, and wraps the toe. Sticking out, Yellow runs across the zipper and heel pull tab while minimal accents of Volt hits the plugs. Following, Black details the Wings, ankle, and Swoosh across the panels. Lastly, we have Sail on the midsole and rubber outsole to finish the look.[/font]
[font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]</br></br>[/font]
[font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]This [/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]nike scarpe running[/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif] comes dressed in a Velvet Brown, Dark Russet, Dark Curry, and Sail color combination. First, the pair features Brown suede on the panels, toe, and ankle. Furthermore, a long-hair suede in Curry adorns the eyestay, wraps the toe, heel, and covers the ankle. More suede appears on the Swoosh that almost looks Red and Curry hits the laces. Finally, a White midsole and a Sail rubber outsole finish the look.[/font]
[font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]</br></br>[/font]
[font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]Going over the two, the first features a White and Multi-Color theme, while the second comes in a Barely Volt and White color combination. The pair in White comes with glow in the dark accents on the Swoosh, heel, hinted on the ankle, and rubber outsole. Following, the [/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]nike air force 1 offerte[/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif] iteration comes with reflective 3M on the heel.[/font]
[font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]</br></br>[/font]
[font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]This [/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif]air zoom type[/font][font=Verdana, Geneva, Lucida, “Lucida Grande”, Arial, Helvetica, sans-serif] comes dressed in a Barely Volt, Chalk Blue, Summit White, and Black color combination. Highlighted the pair, it comes covered in Barely Volt while perforations cover the toe. Following, Black pixelated dots form the Swoosh on the side panels, and a Swoosh with N.354 branding hits the medial side.[/font]

Shopify 1 Product Store (Diaper Bag Store)

Why are you selling this site?
The handycrib was established to represent a 3-in-1 backpack. It's a product that's still profitable and you can do competitor research on google shopping, facebook ads library to confirm.

The handycrib was established to represent a 3-in-1 backpack. The marketing budget was my obstacle and I have already moved on to other business ventures.

How is it monetized?
Shopify orders.

Does this site come with any social media accounts?
No but…

Shopify 1 Product Store (Diaper Bag Store)

Very Old Domain Is Now A Shopify Store

Why are you selling this site? Because I hate the niche

How is it monetized? Dropship Sales

Does this site come with any social media accounts? NO

How much time does this site take to run? A few minutes now

What challenges are there with running this site? Marketing

Let's just call this a failed experiment on my part….

Very Old Domain Is Now A Shopify Store

NanoICE – Premium Shopify One-product Branded Car Detailing Store

Premium Shopify One-product Branded Car Detailing Store

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1. About Us

The nanoICE website is owned by “Linkom-PC” Ltd. which is the founder of the project. Linkom-PC Ltd is a company has been present for more…

NanoICE – Premium Shopify One-product Branded Car Detailing Store

My own game disappears after installation on Google play store

I have a problem where I just installed my own game I made into my phone, but however my game just appears to be not be openable it just shows one button "Uninstall", instead of open. I do however saw that my app appears to be hidden in my phone app settings. Did I did something wrong? I used Android studio to make my signed APK or AAB game. For this published game it is a AAB. Is that bad?enter image description here

How to store outputs as coordinates and use ListPlot to plot them?

so I have a program that outputs a desired value for incrementing values of alpha. Right now, my program prints a list of these for 40 values of alpha in the form {alpha, newValue}.

d = 1000; For[k = 1, k <= 40, k++,   alpha = 0.1*k;   fd = 3*d^2/(Pi^2);    fs = fd*FareySequence[d];   count = 0;    For[i = 1, i < fd, i++,     For[j = (i - 1), j > 0, j--,       If[(fs[[i]] - fs[[j]]) < alpha, count++, Break[]]];];     newValue = count/d^2;   Print["{", alpha, ",", newValue, "}"];   ]; 

Here are the first few outputs:

{0.1,0} {0.2,0} {0.3,0} {0.4,1911/100000} {0.5,13593/250000} {0.6,90521/1000000} .. .. .. {3.9,1155653/1000000} {4.,74163/62500} 

I want to make a plot all of these outputs as coordinates. I want to plot these point on a graph with alpha on the x axis and newValue on the y axis. Any help would be appreciated.

Alidropship Store

Why are you selling this site?
Offline commitment does not allow time to manage the store

How is it monetized?
Dropshipping store

Does this site come with any social media accounts?
No

How much time does this site take to run?
2 Hrs daily

What challenges are there with running this site?
None

Store cookies for multiple sites on remote server and connect from multiple clients


Would it be secure to:

  1. Store all my website cookies (stack sites, webhost, github, web-based email, etc) on a remote server (using an customized open-source VPN or something)
  2. Login to the server with password + 2fa (and maybe have a trusted devices list?)
  3. Keep the cookies only on the server… never actually download them to any of my devices
  4. When visiting stackexchange.com, for example, my server would send the cookies to stack exchange, get the response, and send it back to me, but REMOVE any cookies & store them only on my server

Benefits (I think):

  1. I could keep diverse and very strong passwords for every website, but don’t store the passwords anywhere digitally (keep them on paper in a safe at home or something)
  2. logging in to all the sites I use on a new device only requires one sign in (to my custom VPN server)
  3. Only cookies would be stored digitally, so if anything went wrong server-side, my passwords would be safe & I could disable all the logins through each site’s web-interface

Problems (I think):

  1. If the authentication to my custom VPN is cracked, then every website I’ve logged into would be accessible
  2. The time & energy & learning required to set something like this up.

Improvement idea:

  1. When I sign in to the server the first time, the server creates an encryption key, encrypts all the cookies with it, and sends the encryption key to me as a cookie. Then on every request, my browser uploads the key, the website’s cookie is decrypted, then the request is made to whatever website I’m visiting. Then only one client could be logged in at a time (unless the encryption cookie were stolen)
  2. Encrypt each cookie with a simple password, short password or pin number
  3. An encryption key that updates daily (somehow)
  4. Keep a remote list of trusted devices, identified by IP address? Or maybe by cookie?

Why not just sign into the browser and sync cookies across devices?

  • Signing into Firefox mobile & Firefox on my computer doesn’t give the cookies to Twitter’s or Facebook’s web-browsers (that frustratingly always open first instead of taking me to my actual browser!)
  • It’s not as cool?
  • That would require me to trust a third-party (of course, I’ll ultimately have to trust my web-host to some extent)