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FrancescoDiMuro

Read from 2 SQLite tables...

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FrancescoDiMuro

Hi guys! How are you? Hope you're fine :)
I'm trying to use SQLite for managing some data, and, I would like to display my "retrieved" data, but I'm trying to do a select from 2 table, and seems to not work properly...
What I'd like to do is retrieve data from 2 tables and display in a listview...

I tried with:

Local $aRisultato, $iRighe, $iColonne, $iRVal
    $iRval = _SQLite_GetTable2d($hDatabase, "SELECT * FROM Magazzino_Rockwell, Magazzino_Siemens;", $aRisultato, $iRighe, $iColonne)
    If $iRVal = $SQLITE_OK Then
    ;_SQLite_Display2DResult($aRisultato)
    _ArrayDisplay($aRisultato)
    EndIf

... but it displays a single record 41 times, and it does this thing for every record in the database...
What do you need to help me? :)
Thanks :D 

EDIT:
Managed with a double If and double query like this:
 

$iRval = _SQLite_GetTable2d($hDatabase, "SELECT * FROM Magazzino_Rockwell;", $aRisultato, $iRighe, $iColonne)
    If $iRVal = $SQLITE_OK Then
        Local $aRisultatoRockwell = $aRisultato
        $iRval = _SQLite_GetTable2d($hDatabase, "SELECT * FROM Magazzino_Siemens;", $aRisultato, $iRighe, $iColonne)
        If $iRVal = $SQLITE_OK Then
            _ArrayConcatenate($aRisultato, $aRisultatoRockwell)
            Local $i, $sRiga, $s_LV_Item
            For $i = 1 To Ubound($aRisultato) - 1
                $sRiga = $aRisultato[$i][0] & "|" & _
                         $aRisultato[$i][1] & "|" & _
                         $aRisultato[$i][2] & "|" & _
                         $aRisultato[$i][3] & "|" & _
                         $aRisultato[$i][4] & "|" & _
                         $aRisultato[$i][5] & "|" & _
                         $aRisultato[$i][6] & "|" & _
                         $aRisultato[$i][7] & "|" & _
                         $aRisultato[$i][8] & "|" & _
                         $aRisultato[$i][9] & "|" & _
                         $aRisultato[$i][10] & "|" & _
                         $aRisultato[$i][11]
                $s_LV_Item = GUICtrlCreateListViewItem($sRiga, $lv_Lista)
            Next

And so, the listview is created :)
If anyone has another more efficient way, I'm here :) Thanks guys :D 
 

Edited by FrancescoDiMuro

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FrancescoDiMuro

Hey guys!
Can someone please explain me how can I retrieve only 1 field from a table?
I.E.: I would like to retrieve the amount of a certain product... How could I set the query, in order to retrieve only the amount of that product, as a single string, and not an array... How can I do it? :) 
Thanks :D 


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jchd

Answer to 1rst post: what is the relationship between the 2 tables? You're asking for the cross product of the two tables (= sets) and that is exactly what the SQL engine yields. Maybe you want to list all rows from both tables. If so, use:

select * from table1
union all
select * from table2

Note: I suspect that if both tables have the same columns and semantics, they should be merged and a column added to discriminate between Rockwell or Siemens.

2nd post: select MYCOLUMN from ...

Note that select * from ... is 99.99% of the time a very bad idea.

  • Like 1

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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FrancescoDiMuro

Good morning @jchd:)
For the first question, I answer Yes.
I want to see all the data contained in the two tables...
For the second post... What should I use? I managed with, but If you have any other idea, please tell me.

_SQLite_QuerySingleRow()

 Thanks :) 

 


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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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jchd

It's OK as far as the row you want to get is acually the first one in the resultset returned by your query.


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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FrancescoDiMuro

Yeah, because the result, in case of "Product found", it's always composed from 2 fields... :) 
Thanks for your time and have a good day! :D 


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