excel VBA动态链接数据库

最近车间制造部有需求，需要通过excel填写的ID获取数据库中的某个取值。研究了一下VBA，简要记录一下代码，仅供参考。

Function GETPMAX(SID As String) As String

    Dim result As String

    '链接数据库
    Set Cnn = CreateObject("ADODB.Connection")
    Set rt = CreateObject("ADODB.Recordset")

    Cnn.ConnectionString = "Provider = SQLOLEDB;User ID= ;password=;Data Source=;Initial Catalog = "
    Cnn.Open
    Sql = "SELECT TOP 1 Pmax FROM dbo where ID='" & SID & "' order by hDateTime desc"

     '获取记录集
    Set rt = Cnn.Execute(Sql)

     '根据字段获取值
    result = CStr(rt("Pmax"))

    GETPMAX = result

    '关闭记录集
    rt.Close

    '关闭数据库链接,释放资源
    Cnn.Close

End Function