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Convert SQLite timestamp to readable human


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Hi people,

I'm tryng to convert SQLite timestamp to readable human format but I get 00:00:00 instead of the known value.

Here my code if someone could help:

#include <Constants.au3>
#include <Date.au3>

Local $EPOCH = 13215743943956926 / 1000000; 16/10/2019 08:59:03 p.m.
Local $EPOCHinHHMMSS= Convert($EPOCH)
ConsoleWrite($EPOCHinHHMMSS)

MsgBox($MB_SYSTEMMODAL, '', ConvertToReadable($EPOCHinHHMMSS))

Func ConvertToReadable($iEpoch)
    Local $difference = _DateDiff("s", "1601/01/01 00:00:00", "1970/01/01 00:00:00")
    Return Convert(_DateDiff("s", $iEpoch, $difference))
EndFunc   ;==>_EpochToDate

Func Convert($t)
    $h = Floor($t / 3600)
    $m = Floor(($t - $h * 3600) / 60)
    $s = Mod($t, 60)
    Return StringFormat('%02i:%02i:%02i',$h, $m, $s)
EndFunc

Thanks in advance.

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30 minutes ago, jcpetu said:

Local $EPOCH = 13215743943956926 / 1000000; 16/10/2019 08:59:03 p.m.

That GMT epoch value for "2019-10-06 8:59:03 p.m." is 1571259543 .  I have no idea where you got your value.

Edited by TheXman
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2 hours ago, mikell said:
$time = 1571259543 
$aCall = DllCall("msvcrt.dll", "str:cdecl", "ctime", "int*", $time)
Msgbox(0,"", $aCall[0])

$time = 13215743943956926 / 10000000 
$aCall = DllCall("msvcrt.dll", "str:cdecl", "ctime", "int*", $time)
Msgbox(0,"", $aCall[0])

:)

Thanks a lot mikell,

by the way, do you know if it is any way for the function to return the timestamp in the format dd/mm/aa hh:mm:ss? or some black magic with StringRegExp!

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9 hours ago, TheXman said:

That GMT epoch value for "2019-10-06 8:59:03 p.m." is 1571259543 .  I have no idea where you got your value.

Hi TheXman, I wasn't sure it was the timestamp, that's the reason I wanted to convert it to readable.

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59 minutes ago, jcpetu said:

do you know if it is any way for the function to return the timestamp in the format dd/mm/aa hh:mm:ss?

Maybe this :

#include <Date.au3>
Local $iTimeStamp = 1571259543
Local $sDate  = _DateAdd('s', $iTimeStamp, '1970/01/01 00:00:00')
Local $sDate2 = StringRegExpReplace($sDate, "(\d{4})/(\d{2})/(\d{2}) (\d{2}):(\d{2}):(\d{2})", "${3}/${2}/${1} ${4}:${5}:${6}")
ConsoleWrite("> EpochToDate = " & $sDate & @CRLF)
ConsoleWrite("> Dateformat2 = " & $sDate2 & @CRLF)

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"In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move."

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1 hour ago, Musashi said:

Maybe this :

#include <Date.au3>
Local $iTimeStamp = 1571259543
Local $sDate  = _DateAdd('s', $iTimeStamp, '1970/01/01 00:00:00')
Local $sDate2 = StringRegExpReplace($sDate, "(\d{4})/(\d{2})/(\d{2}) (\d{2}):(\d{2}):(\d{2})", "${3}/${2}/${1} ${4}:${5}:${6}")
ConsoleWrite("> EpochToDate = " & $sDate & @CRLF)
ConsoleWrite("> Dateformat2 = " & $sDate2 & @CRLF)

Hi Musashi, yes it does it!

Thanks a lot.

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For the record, SQLite doesn't propose any timestamp specific format.  You can store dates as text (e.g. '2019-12-09 17:32:17'), as integer (e.g. Un*x epoch), as Julian date, as Julian day, whatever.  You have to be consistent: reading back timestamps under the format you used when storing them.

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Hi people, Im sorry to bother but the example works well for 10 digits timestamp but Chrome's timestamp is formatted as the number of microseconds since January, 1601 so I need to convert to seconds, calculate seconds until 01/01/1601 and  finally add the decimal part of EPOCH.

I do all calculations but the timestamp doesn't match with original timestamp, so if anyone could help please I will appreciate.

#include <array.au3>
#include <Constants.au3>
#include <Date.au3>

;            13218946054701800 = 22/11/2019 22:27:34
$EPOCHtime = 13218946054701800 / 1000000 ;------------------ convert from microseconds to seconds ---------------------
ConsoleWrite("$EPOCHtime = "&$EPOCHtime &@CRLF)

$time1 = _DateAdd('s', Int($EPOCHtime), "1601/01/01 00:00:00"); Chrome time base, 1601
ConsoleWrite("$time1 = " & $time1 &  @CRLF)

$decimalPart=$EPOCHtime -Int($EPOCHtime)
ConsoleWrite("$decimalPart= "&$decimalPart&@CRLF)

$time2 = _DateAdd('s',Int($decimalPart), $time1 )
ConsoleWrite("$time2 = " & $time2 &  @CRLF)

--> output
$EPOCHtime = 13218946054.7018
$time1 = 2019/11/23 01:27:34
$decimalPart= 0.701799392700195
$time2 = 2019/11/23 01:27:34
 

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Chrome time is based on UTC, add / subtract the offset to your own timezone.

Edit - This works fine for me:

#include <array.au3>
#include <Constants.au3>
#include <Date.au3>

;            13218946054701800 = 22/11/2019 22:27:34
$EPOCHtime = 13220446295000000 / 1000000 ;------------------ convert from microseconds to seconds ---------------------

$a_TimeZoneInfo = _Date_Time_GetTimeZoneInformation()
$EPOCHtime -= $a_TimeZoneInfo[1]*60

ConsoleWrite("$EPOCHtime = "&$EPOCHtime &@CRLF)

$time1 = _DateAdd('s', Int($EPOCHtime), "1601/01/01 00:00:00"); Chrome time base, 1601
ConsoleWrite("$time1 = " & $time1 &  @CRLF)

$decimalPart=$EPOCHtime -Int($EPOCHtime)
ConsoleWrite("$decimalPart= "&$decimalPart&@CRLF)

$time2 = _DateAdd('s',Int($decimalPart), $time1 )
ConsoleWrite("$time2 = " & $time2 &  @CRLF)

 

Edited by KaFu
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Since the topic was also on SQLite, you can use SQLite to perform the conversion for you, without using application code:

select datetime(13218946054701800 / 1000000 + strftime('%s', '1601-01-01'), 'unixepoch', 'localtime') as Converted;
outputs:
2019-11-23 02:27:34

We clearly don't have the same localtime than OP (here = Paris).

Better yet, use an SQLite trigger to perform once for all the conversion when the Chrome epoch data is entered. E.g.

CREATE TABLE [T](
  [Date] CHAR;

CREATE TRIGGER [trInsChromeEpoch]
AFTER INSERT ON [T]
FOR EACH ROW
WHEN CAST([new].[Date] AS INT) > 9999
BEGIN
  UPDATE
    [T]
  SET
    [Date] = DATETIME ([new].[Date] / 1000000 + STRFTIME ('%s', '1601-01-01'), 'unixepoch', 'localtime')
  WHERE
    [rowid] = [new].[rowid];
END;

INSERT INTO [T] VALUES(13218946054701800);

 

Edited by jchd

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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A trigger like the one examplified above would do.

If you already have a table populated with Chrome epoch column(s), you just have to perform a massive UPDATE.

Use a 3rd-party SQLite manager (I warmly recommend SQLite Expert), run the above SQL snippet and watch the result being what you expect.  Due to our distinct timezones, you won't have the same output as Kafu or myself, but it should make you happy.

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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  • 7 months later...

Hi, now trying to convert a timestamp to Chrome/webkit I can' t achieve it. So if somebody can help I'll appreciate. 

#include <Date.au3>

Local $Date = "2020/07/27 16:22:23" ;=13240351343870418
ConsoleWrite("Timestamp to Chrome/webkit = " & HumanToWebkit($Date) & @CRLF) ;OK

Func HumanToWebkit($Date)
    Local $WebKit = _DateAdd('s', -Int($Date), "1601/01/01 00:00:00")
    Local $a_TimeZoneInfo = _Date_Time_GetTimeZoneInformation()
    $Seconds = $a_TimeZoneInfo[1] * 60
    Local $DateWebKit = ($WebKit * ($Seconds + ($WebKit * 1000000)))
    Return StringFormat("%017i", $DateWebKit)
EndFunc   ;==>HumanToWebkit

 

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Maybe this :

Local $Date = "2020/07/27 16:22:23" ;=13240351343870418
ConsoleWrite("Timestamp to Chrome/webkit = " & HumanToWebkit($Date) & @CRLF) ;OK

Func HumanToWebkit($Date)
    Local $WebKit = _DateDiff('s', "1601/01/01 00:00:00", $Date)
    Local $a_TimeZoneInfo = _Date_Time_GetTimeZoneInformation()
    $Seconds = $a_TimeZoneInfo[1] * 60
    Local $DateWebKit = $WebKit + $Seconds
    Return Int($DateWebKit & "000000")
EndFunc   ;==>HumanToWebkit

 

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