classic ASP - Multidimensionnal array for storing and displaying multiple rows grouped by common fields

I've these datas in database

COMPANY   | CATEGORY   | BRAND    
--------------------------------
Company 1 | Category 2 | Brand A  
Company 1 | Category 2 | Brand B  
Company 1 | Category 2 | Brand C  
Company 1 | Category 1 | Brand X  
Company 1 | Category 1 | Brand Y  
Company 1 | Category 1 | Brand Z  
Company 1 | Category 3 | Brand A  
Company 1 | Category 3 | Brand X  

I would like to display them in this way :

COMPANY 1

• CATEGORY 1:

BRAND X

BRAND Y

BRAND Z

• CATEGORY 2

BRAND A

BRAND B

BRAND C

• CATEGORY 3

BRAND A

BRAND X

In php, it's easy :

1. first loop to put database results in a multidimensionnal array
2. second loop to display the array

  while ($row = mysql_fetch_assoc($result)) {
    $companies[$row['company']][$row['category']][] = $row['brand'];
  }

  foreach ($companies AS $company => $categories) {
    echo '<h2>'. htmlentities($company, ENT_COMPAT, 'UTF-8') .'</h2>';
    echo '<ul>';
    foreach ($categories AS $category => $brands) {
      echo '<li>'. htmlentities($category, ENT_COMPAT, 'UTF-8');
      foreach ($brands AS $brand) {
        echo '<br><em>'. htmlentities($brand, ENT_COMPAT, 'UTF-8') .'</em>';
      }
      echo '<br> </li>';
    }
    echo '</ul>';
  }

But in classic asp, how to have a multidimensionnal array ?

with array of array ? Dictionnary of arrays ? Dictionnary of Dictionnaries ?

After several hours to test some code, i ask to ChatGPT

classic ASP - get data from database and display them in a 5 depth list
I've these column datas in database

Niveau1 | Niveau2| Niveau3| Niveau4| Niveau5

I would like to display them in list group by Niveau5, inside list group by Niveau4, inside list group by Niveau3, inside list group by Niveau2, inside list group by Niveau1

The answer is OK

    <%
' Step 1: Retrieve data from the database (assuming you have already connected to the database and have a recordset called "rs")

' Create a nested data structure to hold the hierarchical data
Dim data
Set data = CreateObject("Scripting.Dictionary")

' Loop through the recordset and organize the data into the nested structure
Do While Not rs.EOF
    Dim niveau1, niveau2, niveau3, niveau4, niveau5
    niveau1 = rs("Niveau1")
    niveau2 = rs("Niveau2")
    niveau3 = rs("Niveau3")
    niveau4 = rs("Niveau4")
    niveau5 = rs("Niveau5")

    ' Check if the niveau1 key exists in the data dictionary
    If Not data.Exists(niveau1) Then
        data.Add niveau1, CreateObject("Scripting.Dictionary")
    End If

    ' Check if the niveau2 key exists in the niveau1 dictionary
    If Not data(niveau1).Exists(niveau2) Then
        data(niveau1).Add niveau2, CreateObject("Scripting.Dictionary")
    End If

    ' Check if the niveau3 key exists in the niveau2 dictionary
    If Not data(niveau1)(niveau2).Exists(niveau3) Then
        data(niveau1)(niveau2).Add niveau3, CreateObject("Scripting.Dictionary")
    End If

    ' Check if the niveau4 key exists in the niveau3 dictionary
    If Not data(niveau1)(niveau2)(niveau3).Exists(niveau4) Then
        data(niveau1)(niveau2)(niveau3).Add niveau4, CreateObject("Scripting.Dictionary")
    End If

    ' Add niveau5 to the niveau4 dictionary
    data(niveau1)(niveau2)(niveau3)(niveau4).Add niveau5, Nothing

    rs.MoveNext
Loop

' Step 3: Generate the HTML list from the nested data structure
Sub GenerateList(data, depth)
    If depth > 0 Then
        Response.Write("<ul>")
    End If

    For Each key In data.Keys
        Response.Write("<li>" & key & "</li>")
        If IsObject(data(key)) Then
            GenerateList data(key), depth + 1
        End If
    Next

    If depth > 0 Then
        Response.Write("</ul>")
    End If
End Sub

' Start generating the list from the top level (Niveau1)
GenerateList data, 0
%>