Common procedures

The following reference need to be added to the references of VBAProject.
Microsoft ActiveX Data Objects x.x Library

'Set values of SQL Server
Private Const ServerName   As String = "myServerName"
Private Const DatabaseName As String = "myDatabaseName"
Private Const UserID       As String = "myID"
Private Const Password     As String = "myPassword"

Public Sub OpenConnection(ByRef cn As ADODB.Connection)    
    cn.ConnectionTimeout = 100 '100 seconds

    '# SQL Server Authentication Mode
    cn.ConnectionString = "Provider=SQLOLEDB;" & _
                          "Server=" & ServerName & ";" & _
                          "Database=" & DatabaseName & ";" & _
                          "USER ID=" & UserID & ";" & _
                          "PASSWORD=" & Password & ";"

    '# Windows Authentication Mode
    'cn.ConnectionString = "Provider=SQLOLEDB;" & _
    '                      "Server=" & ServerName & ";" & _
    '                      "Database=" & DatabaseName & ";" & _
    '                      "Integrated Security=SSPI;"

    cn.Open    
End Sub

Public Sub OpenRecordsetToRead(ByRef cn As ADODB.Connection, _
                               ByRef rs As ADODB.Recordset, _
                               ByVal sql As String)
    rs.CursorLocation = adUseServer
    rs.CursorType = adOpenForwardOnly
    rs.LockType = adLockReadOnly
    rs.ActiveConnection = cn
    rs.Source = sql
    rs.Open
End Sub

Public Sub OpenRecordsetToUpdate(ByRef cn As ADODB.Connection, _
                                 ByRef rs As ADODB.Recordset, _
                                 ByVal sql As String)
    rs.CursorLocation = adUseServer
    rs.CursorType = adOpenKeyset
    rs.LockType = adLockPessimistic
    rs.ActiveConnection = cn
    rs.Source = sql
    rs.Open
End Sub

Public Sub CloseRecordset(ByRef rs As ADODB.Recordset)
    If Not rs Is Nothing Then
        If rs.State = adStateOpen Then rs.Close
        Set rs = Nothing
    End If
End Sub

Public Sub CloseConnection(ByRef cn As ADODB.Connection)
    If Not cn Is Nothing Then
        If cn.State = adStateOpen Then cn.Close
        Set cn = Nothing
    End If
End Sub

See also Microsoft SQL documentation for ConnectionString of ADODB.Connection
Microsoft OLE DB Provider for SQL Server Overview

Use SQL SELECT statement

Note: The code below uses the common procedures listed at the top of the page.

Public Sub GetRecordset()

    On Error GoTo ErrHandler

    Dim sql As String

    Dim cn As New ADODB.Connection
    Dim rs As New ADODB.Recordset

    sql = "SELECT * FROM SampleTable"

    Call OpenConnection(cn)
    Call OpenRecordsetToRead(cn, rs, sql)

    If rs Is Nothing Or (rs.BOF And rs.EOF) Then
        Exit Sub
    End If

    Do Until rs.EOF
        Debug.Print rs.Fields(0).Value 'Show 1st filed of table
        Debug.Print rs.Fields(1).Value 'Show 2nd filed of table
        rs.MoveNext
    Loop

    Call CloseRecordset(rs)
    Call CloseConnection(cn)

    Exit Sub

ErrHandler:
    Call CloseRecordset(rs)
    Call CloseConnection(cn)
    Debug.Print "ErrNumber:" & Err.Number & " " & Err.Description

End Sub

Use SQL statement of INSERT, UPDATE and DELETE

Note: The code below uses the common procedures listed at the top of the page.

Public Sub ExecuteSQL()

    On Error GoTo ErrHandler

    Dim cn As New ADODB.Connection
    Dim sql As String

    Call OpenConnection(cn)

    sql = "INSERT INTO SampleTable (No, FirstName, LastName) Values(1,'John','Smith')"

    'cn.BeginTrans '#Begin transaction    
    cn.Execute sql    
    'cn.CommitTrans '#Commit transaction

    Call CloseConnection(cn)

    Exit Sub

ErrHandler:
    'cn.RollbackTrans '#Rollback
    Call CloseConnection(cn)
    Debug.Print "ErrNumber:" & Err.Number & " " & Err.Description
End Sub

Properties of ADODB.Recordset

ADODB.Recordset has three properties to set.

CursorLocation
CursorType
LockType

See also Microsoft SQL documentation

If set properties are wrong, properties are modified to proper setting automatically.

The following table shows how the set properties are modified. Items written in red are the properties modified.

The table can be output from the following code.
Note: The code below uses the common procedures listed at the top of the page.

Public Sub OutputAdoRsProperty()

    On Error GoTo ErrHandler

    Dim cn As New ADODB.Connection
    Dim rs As New ADODB.Recordset
    Dim arrayCursorLocation() As Variant
    Dim arrayCursorType()     As Variant
    Dim arrayLockType()       As Variant
    Dim currentCursorLocation As Variant
    Dim currentCursorType     As Variant
    Dim currentLockType       As Variant
    Dim fieldsResult          As String
    Dim currentResult         As String
    Dim filePathResult        As String

    arrayCursorLocation = Array(adUseClient, adUseServer)

    arrayCursorType = Array(adOpenDynamic, _
                            adOpenForwardOnly, _
                            adOpenKeyset, _
                            adOpenStatic)

    arrayLockType = Array(adLockBatchOptimistic, _
                          adLockOptimistic, _
                          adLockPessimistic, _
                          adLockReadOnly)

    filePathResult = CurrentProject.Path & "\AdoRsPropertyAbility.csv"

    fieldsResult = "Setting Cursor Location," & _
                   "Setting Cursor Type," & _
                   "Setting Lock Type," & _
                   "Actual Cursor Location," & _
                   "Actual Cursor Type," & _
                   "Actual Lock Type," & _
                   "adAddNew," & _
                   "adApproxPosition," & _
                   "adBookmark," & _
                   "adDelete," & _
                   "adFind," & _
                   "adHoldRecords," & _
                   "adIndex," & _
                   "adMovePrevious," & _
                   "adNotify," & _
                   "adResync," & _
                   "adSeek," & _
                   "adUpdate," & _
                   "adUpdateBatch"

    Call WriteCurrentResult(filePathResult, fieldsResult)

    Dim sql As String
    sql = "SELECT * FROM SampleTable"

    For Each currentCursorLocation In arrayCursorLocation
        For Each currentCursorType In arrayCursorType
            For Each currentLockType In arrayLockType
                Call OpenConnection(cn)
                rs.CursorLocation = currentCursorLocation
                rs.CursorType = currentCursorType
                rs.LockType = currentLockType
                rs.ActiveConnection = cn
                rs.Source = sql
                rs.Open

                'Setting Cursor Location
                currentResult = GetCursorLocation(currentCursorLocation) & ","

                'Setting Cursor Type
                currentResult = currentResult & GetCursorType(currentCursorType) & ","

                'Setting Lock Type
                currentResult = currentResult & GetLockType(currentLockType) & ","

                'Actual  Cursor Location
                currentResult = currentResult & GetCursorLocation(rs.CursorLocation) & ","

                'Actual  Cursor Type
                currentResult = currentResult & GetCursorType(rs.CursorType) & ","

                'Actual  Lock Type
                currentResult = currentResult & GetLockType(rs.LockType) & ","

                'CursorOptionEnum adAddNew
                currentResult = currentResult & rs.Supports(adAddNew) & ","

                'CursorOptionEnum adApproxPosition
                currentResult = currentResult & rs.Supports(adApproxPosition) & ","

                'CursorOptionEnum adBookmark
                currentResult = currentResult & rs.Supports(adBookmark) & ","

                'CursorOptionEnum adDelete
                currentResult = currentResult & rs.Supports(adDelete) & ","

                'CursorOptionEnum adFind
                currentResult = currentResult & rs.Supports(adFind) & ","

                'CursorOptionEnum adHoldRecords
                currentResult = currentResult & rs.Supports(adHoldRecords) & ","

                'CursorOptionEnum adIndex
                currentResult = currentResult & rs.Supports(adIndex) & ","

                'CursorOptionEnum adMovePrevious
                currentResult = currentResult & rs.Supports(adMovePrevious) & ","

                'CursorOptionEnum adNotify
                currentResult = currentResult & rs.Supports(adNotify) & ","

                'CursorOptionEnum adResync
                currentResult = currentResult & rs.Supports(adResync) & ","

                'CursorOptionEnum adSeek
                currentResult = currentResult & rs.Supports(adSeek) & ","

                'CursorOptionEnum adUpdate
                currentResult = currentResult & rs.Supports(adUpdate) & ","

                'CursorOptionEnum adUpdateBatch
                currentResult = currentResult & rs.Supports(adUpdateBatch)

                Call WriteCurrentResult(filePathResult, currentResult)

                Call CloseRecordset(rs)
                Call CloseConnection(cn)
            Next currentLockType
        Next currentCursorType
    Next currentCursorLocation

    MsgBox "Output has been completed.", vbInformation

    Exit Sub

ErrHandler:
    Call CloseRecordset(rs)
    Call CloseConnection(cn)
    Debug.Print "ErrNumber:" & Err.Number & " " & Err.Description

End Sub

Private Function GetCursorLocation(ByVal lngCursorLocation As Long) As String
    Select Case lngCursorLocation
        Case 2
            GetCursorLocation = "adUseServer"
        Case 3
            GetCursorLocation = "adUseClient"
    End Select
End Function

Private Function GetCursorType(ByVal lngCursorType As Long) As String
    Select Case lngCursorType
        Case 0
            GetCursorType = "adOpenForwardOnly"
        Case 1
            GetCursorType = "adOpenKeyset"
        Case 2
            GetCursorType = "adOpenDynamic"
        Case 3
            GetCursorType = "adOpenStatic"
    End Select
End Function

Private Function GetLockType(ByVal lngLockType As Long) As String
    Select Case lngLockType
        Case 1
            GetLockType = "adLockReadOnly"
        Case 2
            GetLockType = "adLockPessimistic"
        Case 3
            GetLockType = "adLockOptimistic"
        Case 4
            GetLockType = "adLockBatchOptimistic"
    End Select
End Function

Private Sub WriteCurrentResult(ByVal filePathResult As String, _
                               ByVal currentResult As String)
    Open filePathResult For Append As #1
    Print #1, currentResult
    Close #1
End Sub

Connect MS Access to SQL Server using ADO

Common procedures

Use SQL SELECT statement

Use SQL statement of INSERT, UPDATE and DELETE

Properties of ADODB.Recordset