DevTut

# SQL in Excel VBA - Best Practices

# How to use ADODB.Connection in VBA?

# Requirements:

Add following references to the project:

  • Microsoft ActiveX Data Objects 2.8 Library
  • Microsoft ActiveX Data Objects Recordset 2.8 Library

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    # Declare variables

    Private mDataBase As New ADODB.Connection
Private mRS As New ADODB.Recordset
Private mCmd As New ADODB.Command

    # Create connection

    # a. with Windows Authentication

    Private Sub OpenConnection(pServer As String, pCatalog As String)
    Call mDataBase.Open("Provider=SQLOLEDB;Initial Catalog=" & pCatalog & ";Data Source=" & pServer & ";Integrated Security=SSPI")
    mCmd.ActiveConnection = mDataBase
End Sub

    # b. with SQL Server Authentication

    Private Sub OpenConnection2(pServer As String, pCatalog As String, pUser As String, pPsw As String)
    Call mDataBase.Open("Provider=SQLOLEDB;Initial Catalog=" & pCatalog & ";Data Source=" & pServer & ";Integrated Security=SSPI;User ID=" & pUser & ";Password=" & pPsw)
    mCmd.ActiveConnection = mDataBase
End Sub

    # Execute sql command

    Private Sub ExecuteCmd(sql As String)
    mCmd.CommandText = sql
    Set mRS = mCmd.Execute
End Sub

    # Read data from record set

    Private Sub ReadRS()
    Do While Not (mRS.EOF)
        Debug.Print "ShipperID: " & mRS.Fields("ShipperID").Value & " CompanyName: " & mRS.Fields("CompanyName").Value & " Phone: " & mRS.Fields("Phone").Value
        Call mRS.MoveNext
    Loop
End Sub

    # Close connection

    Private Sub CloseConnection()
    Call mDataBase.Close
    Set mRS = Nothing
    Set mCmd = Nothing
    Set mDataBase = Nothing
End Sub

    # How to use it?

    Public Sub Program()
    Call OpenConnection("ServerName", "NORTHWND")
    Call ExecuteCmd("INSERT INTO [NORTHWND].[dbo].[Shippers]([CompanyName],[Phone]) Values ('speedy shipping','(503) 555-1234')")
    Call ExecuteCmd("SELECT * FROM [NORTHWND].[dbo].[Shippers]")
    Call ReadRS
    Call CloseConnection
End Sub

    # Result

    ShipperID: 1 CompanyName: Speedy Express Phone: (503) 555-9831

    ShipperID: 2 CompanyName: United Package Phone: (503) 555-3199

    ShipperID: 3 CompanyName: Federal Shipping Phone: (503) 555-9931

    ShipperID: 4 CompanyName: speedy shipping Phone: (503) 555-1234

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