ActiveX Data Objects - DSN-Less Database connection demo

GreenCan · April 23, 2015

This is an example how to access/query different kind of Databases with AutoIt. The demo contains also test Databases, so the script functions for most of the provided database connections.

Databases covered here:

Oracle (no demo database for this one)
MS SQL Server (no demo database for this one)
SQLite (requires installation of the SQLite ODBC driver software available here: http://www.ch-werner.de/sqliteodbc/ )

Of course SQLite is natively available in AutoIt but in some cases it might be preferable to use the ODBC approach accessing the database via the same scripted method, for example if you use different Databases in the same script, it is much easier to code.

Excel
DBase DBF
MS Access
CSV Text driver (semicolon delimited and comma delimited)

The example script is based on Kinshima’s Oracle SQL example . I like the Dim by pack method, much better than redim one row at the time, which too slow.

All the databases have the same data content (‘Timeline_of_space_exploration’) to keep the examples similar for every database.

The result of each SQL will be displayed in Arraydisplay, togheter with a window containing the ADO-less connection string (yellow) and SQL.

#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Res_Comment=Comprehensive DSN-Less Database connection demo
#AutoIt3Wrapper_Res_Description=DSN-Less Database connection demo
#AutoIt3Wrapper_Res_Fileversion=1.0.0.0
#AutoIt3Wrapper_Res_LegalCopyright=GreenCan
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****

#include <array.au3>
#include <MsgBoxConstants.au3>
#include <WindowsConstants.au3>
#include <EditConstants.au3>
#include <GUIConstantsEx.au3>
#include <ButtonConstants.au3>

Opt('MustDeclareVars', 1)

Global $oODBC_Connection = ObjCreate("ADODB.Connection")
Global $oODBC_RecordSet = ObjCreate("ADODB.Recordset")
Global $bODBC_conn = False
Global $oErrADODB = ObjEvent("AutoIt.Error", "_ErrADODB")
Global $bConn_error = False

Global $sConnectionString, $sSQL

Global Const $iDark_Blue = 0x2601D3
Global Const $iLight_Green = 0xEAFFE8
Global Const $iYellow = 0xFFFF99

; setup GUI to display SQL
Global $hGUI_View_SQL = GUICreate("SQL", 500, 500, 10, 10, $WS_CAPTION);, $WS_EX_TOPMOST)
Global $hConnString = GUICtrlCreateEdit("", 5, 3, 490, 38, BitOR($ES_AUTOHSCROLL, $ES_READONLY, $ES_WANTRETURN, $WS_HSCROLL))
GUICtrlSetColor(-1, $iDark_Blue)
GUICtrlSetBkColor(-1, $iYellow)
Global $ViewSQL = GUICtrlCreateEdit("", 5, 45, 490, 450, BitOR($ES_AUTOVSCROLL, $ES_AUTOHSCROLL, $ES_READONLY, $ES_WANTRETURN, $WS_HSCROLL, $WS_VSCROLL))
GUICtrlSetColor(-1, $iDark_Blue)
GUICtrlSetBkColor(-1, $iLight_Green)
GUISetState()

#========== Demo =============
Global $sDatabaseLocation = @ScriptDir & "\TestDatabases"

#========== Oracle =============
;~ #cs
;~ Not demo-able except if you have an Oracle instance
;~ #ce

$sConnectionString = 'DRIVER={Oracle in OraClient11g_home1};DBQ=myDatabase.world;uid=myUserID;pwd=myPassword;'
$sSQL = 'SELECT sysdate AS "Sysdate Raw", to_char(sysdate, ''Dy DD/MM/YY HH24:MI'') AS "Now" FROM dual'
Format_SQL($sSQL, $sConnectionString)
MsgBox(0,"Oracle SQL","You require to have access to an Oracle instance and modify the connection string before proceeding without error." & @CRLF & "The current Connection string will generate a COM error.")
Query($sConnectionString, $sSQL, 500, "SQL Oracle")

#========== MS SQL Server =============
MsgBox(0,"MS SQL Server","You require to have access to a SQL Server instance and modify the connection string before proceeding without error." & @CRLF & "The current Connection string will generate a COM error.")
$sConnectionString = 'DRIVER={SQL Server};SERVER=ServerNameorIP;DATABASE=DatabaseServer;Trusted_Connection=no;uid=myUserID;pwd=myPassword;'
$sSQL = 'SELECT 18 AS "Circle Radius",round(PI() * power(18,2) ,3) AS "Surface of circle", round(PI() * 18 * 2,3) AS "Circumference of circle"'
Format_SQL($sSQL, $sConnectionString)
Query($sConnectionString, $sSQL, 500, "MS SQL Server")

#========== SQLite =============
#cs
Accessing SQLite via ODBC requires installation of the SQLite ODBC driver software available here:
http://www.ch-werner.de/sqliteodbc/

Note: You will have to install the 32-bit driver,  as far as I could test, x6' version, sqliteodbc_w64 doesn't function on my x64 Windows

You can access SQLite natively FROM AutoIt
    For example look at my topics
        - SQLite Report generator
            http://www.autoitscript.com/forum/topic/149767-sqlite-report-generator/#entry1068258
        - SQLite demonstration of native recognition of BLOB object in Listview
            http://www.autoitscript.com/forum/topic/150876-sqlite-demonstration-of-native-recognition-of-blob-object-in-listview/#entry1078492
#ce
$sConnectionString = 'DRIVER=SQLite3 ODBC Driver;Database=' & $sDatabaseLocation & '\Timeline_of_space_exploration.xdb;LongNames=0;Timeout=1000;NoTXN=0;SyncPragma=NORMAL;StepAPI=0;'
;~ $sConnectionString = 'DRIVER=SQLite3 ODBC Driver;Database=D:\SQLite\Netline.db;LongNames=0;Timeout=1000;NoTXN=0;SyncPragma=NORMAL;StepAPI=0;'
$sSQL = 'SELECT * FROM space_exploration;'
Format_SQL($sSQL, $sConnectionString)
Query($sConnectionString, $sSQL, 500, "SQLite")

#========== Excel =============
#cs
The sheet range to be queried has a name defined AS SpaceTable
Check the Excel sheet by selecting all (Ctrl-A)
#ce
$sConnectionString = 'DRIVER={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};dbq=' & $sDatabaseLocation & '\Timeline_of_space_exploration.xlsx;'
$sSQL = 'SELECT Format (Date, ''dd-MM-yyyy'') AS "Event", Mission_Achievements AS "Mission Achievements", Country, Organization, Mission_Name AS "Mission Name" ' & _
    ' FROM SpaceTable ORDER BY Date'
Format_SQL($sSQL, $sConnectionString)
Query($sConnectionString, $sSQL, 500, "SQL Microsoft Excel")

#========== DBase DBF =============
#cs
Old Borland/Clipper Database
#ce
$sConnectionString = 'DRIVER={Microsoft dBase Driver (*.dbf)};Dbq='& $sDatabaseLocation & ';'
$sSQL = 'SELECT Format (DATE, ''dd MMM yyyy'') AS "Event", MISSION AS "Mission Achievements", Country, ORG AS "Organization", MNAME AS "Mission Name" ' & _
    ' FROM SPACE.DBF WHERE (((DATE) Between #22/04/1900# And #22/04/2015# +1)) AND UCASE(Country) <> ''USA'' ORDER BY Date'
Format_SQL($sSQL, $sConnectionString)
Query($sConnectionString, $sSQL, 500, "SQL DBase")

#========== MS Access =============
#cs
The MSAccess Example.mdb is protected with following password:
    DatabaseSQL
#ce
$sConnectionString = 'DRIVER={Microsoft Access Driver (*.mdb)};Dbq=' & $sDatabaseLocation & '\Example.mdb;uid=;pwd=DatabaseSQL;'
$sSQL = 'SELECT Format (Date, ''dd MMM yyyy'') AS "Event", Mission_Achievements AS "Mission Achievements", Country, Organization, Mission_Name AS "Mission Name" ' & _
    ' FROM  Timeline_of_space_exploration WHERE (((Date) Between #22/04/1900# And #22/04/2015# +1)) ORDER BY Date'
Format_SQL($sSQL, $sConnectionString)
Query($sConnectionString, $sSQL, 500, "SQL MS Access")

#========== CSV Text driver, semicolon delimited =============
#cs
Some variations of the same SQL

requires schema.ini in the same folder AS the text file
    https://msdn.microsoft.com/en-us/library/windows/desktop/ms709353(v=vs.85).aspx

schema.ini settings:
    [Timeline_of_space_exploration_semicolon.txt]
    ColNameHeader=True
    Format=Delimited(;)
    MaxScanRows=1
#ce

$sConnectionString = 'DRIVER={Microsoft Text Driver (*.txt; *.csv)};Dbq=' & $sDatabaseLocation & ';Extensions=asc,csv,tab,txt;'

$sSQL = 'SELECT Format (Date, ''dd MMM yyyy'') AS "Event", Mission_Achievements AS "Mission Achievements", Country, ' & _
    'Organization, Mission_Name AS "Mission Name" FROM Timeline_of_space_exploration_semicolon.txt ORDER BY Date'
Format_SQL($sSQL, $sConnectionString)
Query($sConnectionString, $sSQL, 500, "SQL Text semicolon delimited")

#========== CSV Text driver, comma delimited =============
#cs
schema.ini settings:
    [Timeline_of_space_exploration.csv]
    ColNameHeader=True
    Format=Delimited(,)
    DecimalSymbol=.
    MaxScanRows=1
#ce

$sSQL = 'SELECT Format (Date, ''dd MMM yyyy'') AS "Event", Mission_Achievements AS "Mission Achievements", Country, ' & _
    'Organization, Mission_Name AS "Mission Name" FROM Timeline_of_space_exploration.csv ORDER BY Date'
Query($sConnectionString, $sSQL, 500, "SQL Text comma delimited")

; USA only
$sSQL = 'SELECT Format (Date, ''dd MMM yyyy'') AS "Event", Mission_Achievements AS "Mission Achievements", Country, ' & _
    'Organization, Mission_Name AS "Mission Name" FROM Timeline_of_space_exploration.csv WHERE (((Date) Between #22/04/1900# And #22/04/2015# +1)) and UCASE(Country) = ''USA'''
Format_SQL($sSQL, $sConnectionString)
Query($sConnectionString, $sSQL, 500, "SQL Text comma delimited - USA Only")
#========== End Demo =============

Exit

Func Query($sConnectionString, $sSQL, $iMaxRows, $sTitle)
    If _ODBC_OpenConnection($sConnectionString) Then

        Local $aRecords = _ODBC_GetRecords($sSQL, 500, $iMaxRows)
        _ODBC_CloseConnection()

        ; set header string
        Local $sHeader = ""
        For $i = 0 to UBound($aRecords, 2) - 1
            $sHeader &= $aRecords[0][$i] & "|"
        Next
        $sHeader = StringTrimRight($sHeader, 1) ; trim of last separator
        _ArrayDisplay($aRecords, _
            $sTitle & " - " & "Query result: " & UBound($aRecords)-1 & " rows" & (UBound($aRecords)-1 = $iMaxRows ? " (result limited to " & $iMaxRows & " rows)" : "")  , _
            "1:" & UBound($aRecords)-1, _
            0, _
            Default, _
            $sHeader)
    EndIf
EndFunc   ;==>Query

Func _ExeSQL($sSQL)
    If Not IsObj($oODBC_Connection) Then Return -1
    $oODBC_Connection.Execute($sSQL)
    If $oErrADODB.number Then
        MsgBox($MB_YESNO + $MB_ICONERROR + $MB_DEFBUTTON2, "_ExeSQL", $sSQL & @CRLF & @CRLF & 'Error. ' & @CRLF & 'Exiting.')
        Exit
    Else
        Return 1
    EndIf
EndFunc   ;==>_ExeSQL

Func _ODBC_CloseConnection()
    $bODBC_conn = False
    Return $oODBC_Connection.Close
EndFunc   ;==>_ODBC_CloseConnection

Func _ODBC_OpenConnection($sConnectionString)
    If Not IsObj($oODBC_Connection) Then Return -1
    If Not @Compiled Then ConsoleWrite ("@@ Debug(" & @ScriptLineNumber & ") : " & $sConnectionString & @CR)

    $oODBC_Connection.ConnectionString = ($sConnectionString)
    $bConn_error = False
    $oODBC_Connection.Open
    If $bConn_error = True Then
        Return False
    EndIf
    $bODBC_conn = True
    Return True
EndFunc   ;==>_ODBC_OpenConnection

Func _ODBC_GetRecords($sSQL, $iArrayIncrement = 250, $iRows = 0)
    ; syntax: _ODBC_GetRecords(SQL, ArrayIncrement, MaxRows)
    If Not $bODBC_conn Then
        MsgBox($MB_OK, 'Error', 'Connection failure')
        Return
    EndIf
    If $iArrayIncrement = 0 Then $iArrayIncrement = 250
    If Not IsObj($oODBC_Connection) Then Return -1
    If Not IsObj($oODBC_RecordSet) Then Return -2
    _ODBC_OpenRecordset($sSQL)
    Local $aRecords[1][1]
    If $oODBC_RecordSet.EOF = True Then
        _ODBC_CloseRecordSet()
        Return False
    EndIf
    $oODBC_RecordSet.MoveFirst
    Local $x = 0
    ReDim $aRecords[1][$oODBC_RecordSet.Fields.Count]
    For $objField In $oODBC_RecordSet.Fields
        $aRecords[0][$x] = $objField.Name
        $x += 1
    Next
    Local $iAIn = UBound($aRecords) + $iArrayIncrement
    ReDim $aRecords[$iAIn][$oODBC_RecordSet.Fields.Count]
    $oODBC_RecordSet.MoveFirst
    Local $y = 0
    Do
        $x = 0
        $y += 1
        For $objField In $oODBC_RecordSet.Fields
            $aRecords[$y][$x] = $objField.Value
            $x += 1
        Next
        If $y = $iAIn - 1 Then
            $iAIn += $iArrayIncrement
            ReDim $aRecords[$iAIn][$oODBC_RecordSet.Fields.Count]
        EndIf
        $oODBC_RecordSet.MoveNext
        If $iRows > 0 Then
            If $y = $iRows Then
                ;_ArrayDisplay($aRecords, @ScriptLineNumber)
                ReDim $aRecords[$y + 1][$oODBC_RecordSet.Fields.Count]
                ;_ArrayDisplay($aRecords, @ScriptLineNumber)
                Return $aRecords
            EndIf
        EndIf
    Until $oODBC_RecordSet.EOF
    ReDim $aRecords[$y + 1][$oODBC_RecordSet.Fields.Count]
    _ODBC_CloseRecordSet()
    Return $aRecords
EndFunc   ;==>_ODBC_GetRecords

Func _ODBC_OpenRecordset($sSQL);
    If Not IsObj($oODBC_Connection) Then Return -1
    If Not IsObj($oODBC_RecordSet) Then Return -2
    Return $oODBC_RecordSet.Open($sSQL, $oODBC_Connection, 0, 1)
EndFunc   ;==>_ODBC_OpenRecordset

Func _ODBC_CloseRecordSet()
    Return $oODBC_RecordSet.Close
EndFunc   ;==>_ODBC_CloseRecordSet

Func _ErrADODB()
    MsgBox($MB_ICONWARNING, "ADODB COM Error", "We intercepted a COM Error !" & @CRLF & @CRLF & _
            "err.description is: " & @TAB & $oErrADODB.description & @CRLF & _
            "err.windescription:" & @TAB & $oErrADODB.windescription & @CRLF & _
            "err.number is: " & @TAB & Hex($oErrADODB.number, 8) & @CRLF & _
            "err.lastdllerror is: " & @TAB & $oErrADODB.lastdllerror & @CRLF & _
            "err.scriptline is: " & @TAB & $oErrADODB.scriptline & @CRLF & _
            "err.source is: " & @TAB & $oErrADODB.source & @CRLF & _
            "err.helpfile is: " & @TAB & $oErrADODB.helpfile & @CRLF & _
            "err.helpcontext is: " & @TAB & $oErrADODB.helpcontext _
            )
        ConsoleWrite($oErrADODB.description & @CR)
    $bConn_error = True
    Return SetError(@error, @error, 1)
EndFunc   ;==>_ErrADODB

Func Format_SQL($sSQL, $sConnectionString)
    ; format SQL script a bit
    ; the formating does not consider UNION,
    Local $stempSQL, $sSQLPart1, $sSQLPart2, $sSQLPart3, $sSQLPart4, $sSQLPart5, $sSQLPart6
    $stempSQL = $sSQL

    ; LIMIT - should be after FROM !
    If StringInStr($stempSQL, "LIMIT", 0, -1) > 0 Then
        If StringInStr($stempSQL, "LIMIT", 0, -1) > StringInStr($stempSQL, "FROM", 0, -1) Then
            $sSQLPart6 = @CRLF & "LIMIT" & @CRLF & @TAB & StringTrimLeft($stempSQL, StringInStr($stempSQL, "LIMIT", 0, -1) + 5)
            $stempSQL = StringStripWS(StringTrimRight($stempSQL, StringLen($stempSQL) - StringInStr($stempSQL, "LIMIT", 0, -1) + 1), 2)
        EndIf
    EndIf

    ; ORDER BY - should be after FROM !
    If StringInStr($stempSQL, "ORDER BY", 0, -1) > 0 Then
        If StringInStr($stempSQL, "ORDER BY", 0, -1) > StringInStr($stempSQL, "FROM", 0, -1) Then
            $sSQLPart5 = @CRLF & "ORDER BY" & @CRLF & @TAB & StringTrimLeft($stempSQL, StringInStr($stempSQL, "ORDER BY", 0, -1) + 8)
            $stempSQL = StringStripWS(StringTrimRight($stempSQL, StringLen($stempSQL) - StringInStr($stempSQL, "ORDER BY", 0, -1) + 1), 2)
        EndIf
    EndIf

    ; GROUP BY - should be after FROM !
    If StringInStr($stempSQL, "GROUP BY", 0, -1) > 0 Then
        If StringInStr($stempSQL, "GROUP BY", 0, -1) > StringInStr($stempSQL, "FROM", 0, -1) Then
            $sSQLPart4 = @CRLF & "GROUP BY" & @CRLF & @TAB & StringTrimLeft($stempSQL, StringInStr($stempSQL, "GROUP BY", 0, -1) + 8)
            $stempSQL = StringStripWS(StringTrimRight($stempSQL, StringLen($stempSQL) - StringInStr($stempSQL, "GROUP BY", 0, -1) + 1), 2)
        EndIf
    EndIf

    ; WHERE - should be after FROM !
    If StringInStr($stempSQL, "WHERE", 0, -1) > 0 Then
        If StringInStr($stempSQL, "WHERE", 0, -1) > StringInStr($stempSQL, "FROM", 0, -1) Then
            $sSQLPart3 = @CRLF & "WHERE" & @CRLF & @TAB & StringTrimLeft($stempSQL, StringInStr($stempSQL, "WHERE", 0, -1) + 5)
            $stempSQL = StringStripWS(StringTrimRight($stempSQL, StringLen($stempSQL) - StringInStr($stempSQL, "WHERE", 0, -1) + 1), 2)
        EndIf
    EndIf

    ; INNER JOIN
    If StringInStr($stempSQL, "INNER JOIN", 0, -1) > 0 Then
        $stempSQL = StringReplace($stempSQL, "INNER JOIN", @CRLF & @TAB & @TAB & "INNER JOIN")
    EndIf

    ; FROM
    If StringInStr($stempSQL, "FROM", 0, -1) > 0 Then
        $sSQLPart2 = @CRLF & "FROM" & @CRLF & @TAB & StringTrimLeft($stempSQL, StringInStr($stempSQL, "FROM", 0, -1) + 4)
        $stempSQL = StringStripWS(StringTrimRight($stempSQL, StringLen($stempSQL) - StringInStr($stempSQL, "FROM", 0, -1) + 1), 2)
    EndIf

    ; SELECT
    If StringInStr($stempSQL, "SELECT", 0, 1) > 0 Then
        $sSQLPart1 = "SELECT" & @CRLF & @TAB & StringReplace(StringReplace(StringTrimLeft($stempSQL, StringInStr($stempSQL, "SELECT", 0, 1) + 6),", ", ",") , ",", ","  & @CRLF & @TAB)
        $stempSQL = StringStripWS(StringTrimRight($stempSQL, StringLen($stempSQL) - StringInStr($stempSQL, "SELECT", 0, 1) + 1), 2)
    EndIf
    GUICtrlSetData ( $hConnString, $sConnectionString)
    GUICtrlSetData ( $ViewSQL, $sSQLPart1 & $sSQLPart2 & $sSQLPart3 & $sSQLPart4 & $sSQLPart5 & $sSQLPart6 & @CRLF )
EndFunc   ;==>Format_SQL

Script and database packs

SQL demo DSN-less connections (multi-DB).zip

GreenCan

Edited April 24, 2015 by GreenCan

mLipok · April 23, 2015

It looks very good.

I'll check this in comming days.

mLipok

GreenCan · April 23, 2015

It looks very good.

I'll check this in comming days.

mLipok

Thank you mLipok, let me know if you have other database ADO-less ideas...

spudw2k · April 23, 2015

Can you explain what you mean by ADO-less? Aren't you using ADO to connect to ODBC?

Global $oODBC_Connection = ObjCreate("ADODB.Connection")
Global $oODBC_RecordSet = ObjCreate("ADODB.Recordset")

GreenCan · April 23, 2015

Can you explain what you mean by ADO-less? Aren't you using ADO to connect to ODBC?
Global $oODBC_Connection = ObjCreate("ADODB.Connection")
Global $oODBC_RecordSet = ObjCreate("ADODB.Recordset")

of course, you are fully correct, I should have written DSN-less connection, this type of connection is using ODBC indeed.

thanks for the correction.

unfortunately, I cannot change the title of the topic anymore...

GreenCan

Edited April 23, 2015 by GreenCan

mLipok · April 23, 2015

unfortunately, I cannot change the title of the topic anymore...

Why ?

spudw2k · April 23, 2015

of course, you are fully correct, I should have written DSN-less connection, this type of connection is using ODBC indeed.

thanks for the correction.

unfortunately, I cannot change the title of the topic anymore...
GreenCan

I believe you can change the topic title if you use the Full Editor on the first post?

Thanks for the explanation...just wanted to make sure I wasn't missing or misunderstanding something.

GreenCan · April 24, 2015

I believe you can change the topic title if you use the Full Editor on the first post?
Thanks for the explanation...just wanted to make sure I wasn't missing or misunderstanding something.

I changed the title and the zip file. No change, just changed ADO in DSN, stupid me...

Thanks,

GreenCan · April 24, 2015

Why ?

because I felt sick yesterday, and still am this morning, hard to think straight...

mLipok · April 24, 2015

I was seek (flu) 3 day ago.

So now I understand.

robertocm · December 5, 2015

This is an example to access/query a MS Access table with a GUI using ADO

Adapted from: Phone Book Rev 02

Original Author: Ayman Henry

(Edited December 10, 2016):
Moved to avoid duplicate content

Edited December 10, 2016 by robertocm

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