FrancescoDiMuro

Queries on .txt file OR import .txt file in SQLite

4 posts in this topic

#1 ·  Posted

Good evening everyone :)
I'm working on this little project for a week, and, what I'm trying to do could be useful for many users as well...
I'm trying to do a "Report Generator", which reads the data that have to report from a text file (.txt) formatted with this pattern;
Data1;Data2;Data3;Data4;Data5;;

YES, there are 2 semi-colon at the end of the line.

In detail, Data1 is a date/time stamp with this format: YYYY/MM/DD HH:MM:SS ;

When the script starts, the user is prompted to choose 2 dates which I'll call as:

  • Report_Date_Start;
  • Report_Date_Start.

So, the report, should cover all dates between Report_Date_Start AND Report_Date_End.

And, already at this point, I don't know how to do the query... How can I say to the script:
SELECT * FROM (.txt) WHERE Data1 BETWEEN Report_Date_Start AND Report_Date_End; ?

I thought that I could do a _DateDiff, but if the difference between the two dates is months and not days, how can I do the trick?
Should I make a Switch...Case with the _DateDiff() and see then calculate all the dates between Report_Date_Start AND Report_Date_End... But then, how can I compare the dates in the file with all the dates between Report_Date_Start AND Report_Date_End? I'm going crazy, I know...

I've already made a "Export Tool", which exports the content of the .txt file in a .db, managed with SQLite... I mean, there I could easily do a query like I did above the thread, but, this "export", for 1080 rows, takes 28 seconds to be done. And, 1080 rows are daily rows that are added every day in the .txt file, so, in a week, the file could be easily 7000+ rows, which means that the "export" would take 3 minutes to be done... And we can go over and over...
I'll post just for be "complete" what I've done about the export, so, maybe, someone could say how to improve it in terms of efficency...
 

Local $aContenutoFileAuditReport = ""
_FileReadToArray($sFileAudit_Report, $aContenutoFileAuditReport)
If(IsArray($aContenutoFileAuditReport) And Not @error) Then
    Local $aContenutoFileAuditReport_Splitted = ""
    Local $sQuery = ""
    Local $hInizioConteggio = TimerInit()
    For $i = 1 To UBound($aContenutoFileAuditReport) - 1
        $aContenutoFileAuditReport_Splitted = StringSplit($aContenutoFileAuditReport[$i], ";")
        $sQuery = "INSERT INTO FileDB_Report(DATESTAMP, TIMESTAMP, USER_ID, OBJECT_ID, DESCRIPTION, COMMENT) " & _
                  "VALUES(" & _
                  _SQLite_FastEscape($aContenutoFileAuditReport_Splitted[0]) & "," & _
                  _SQLite_FastEscape($aContenutoFileAuditReport_Splitted[1]) & "," & _
                  _SQLite_FastEscape($aContenutoFileAuditReport_Splitted[3]) & "," & _
                  _SQLite_FastEscape($aContenutoFileAuditReport_Splitted[4]) & "," & _
                  _SQLite_FastEscape($aContenutoFileAuditReport_Splitted[5]) & "," & _
                  _SQLite_FastEscape($aContenutoFileAuditReport_Splitted[6]) & ");"
                 If(_SQLite_Exec($hFileDB_Report, $sQuery) <> $SQLITE_OK) Then
                    ConsoleWrite("Errore durante l'esecuzione della query #" & $i & @CRLF)
                 Else
                    ConsoleWrite("Query eseguita correttamente #" & $i & @CRLF)
                 EndIf
            Next
            ConsoleWrite("Esportazione completata in: " & Round(TimerDiff($hInizioConteggio)/1000, 0) & " secondi")
        Else
            MsgBox($MB_ICONERROR, "Errore!", "Errore durante la lettura del file nell'array." & @CRLF & "Errore: " & @error)
        EndIf

I know that I can't do queries from a .txt file...
[19:18] 
I've been writing this post from 18:40 maybe...
By the way, if @jchd or someone else could tell me if I can import a formatted .txt file in SQLite and then, do queries on the DB, I'd be very happy for that...
About the report in PDF, I'm talking with @taietel in order to know how to create a PDF.
I hope someone will help me :)
Sorry for the "long" list of questions...
Thank you for everything you've done for me :)
I have to say that this is the community of programming language that I've loved most! :D
By the way, I'll be back tomorrow in the morning ( ~ 9:15 a.m. Italian time ), so, excuse me if I can't answer before that time.
Hope you guys have a wonderful day/night.


Thanks again :)

Francesco


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I will always thank you for the time you spent for me.
I'm here to ask, and from your response, I'd like to learn.
By my knowledge, I can help someone else, and "that someone" could help in turn another, and so on.

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#2 ·  Posted

28s for 1080 rows seems a lot. Well it depends on what data2 to data5 look like, but anyway that seems a lot.

The SQLite command-line interface (sqlite3.exe aka the CLI) allows direct import of a CSV formatted file into a DB. Run sqlite3.exe -help to see options. You can invoke it thru _SQLite_SQLiteExe() funcion call.

All you'll have to do is to sanitize your input. To keep safe from possible single quotes in the data fields, you can read the whole file at once, StringReplace single quotes by double single quotes, StringReplace double quotes by double double quotes, StringRegexReplace the result to insert double quotes around string fields and supply that to sqlite3.exe as a csv file.

Else wrap your bulk inserts inside a transaction, you know: "begin;" ... "end;". That will surely cut your 28s significantly down.


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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#3 ·  Posted

Good morning @jchd:)
I'll try what you suggested to me :)
By the way, how can I set the sqlite3.dll in my system?
I did a post where I cannot register properly the sqlite3.dll, and I had to download, register and use in the script the sqlite3_x64.dll.
How can I set this "environment" properly? Thank you :) 


Click here to see my signature:

Spoiler

I will always thank you for the time you spent for me.
I'm here to ask, and from your response, I'd like to learn.
By my knowledge, I can help someone else, and "that someone" could help in turn another, and so on.

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#4 ·  Posted

You don't have to register the dll for using it. Just drop it in the directory of the executable, or in @systemdir. No environment needed either.


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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