Salesforce 如何删除visualforce页面中的重复单元格项

我有一个控制器和visualforce页面来显示3列（对象、TotalAttachmentCount、ContentTypecount），其中TotalAttachmentCount值对每个ContentTypecount重复。我想在TotalAttachmentCount中隐藏重复项，并为每个对象仅显示一次

我的控制器代码

public Map<String, integer>  mapofObject {set;get;}
    public MyController(){
        mapofObject = new Map<String, integer>();
        for(AggregateResult at:[select Parent.Type b,count(id) from Attachment group BY Parent.Type]){
            String Name = (string)(at.get('b'));
            integer a = (integer)at.get('expr0');
            mapofObject.put(Name,a);  
        } 
    }
    public AggregateResult[] results {
        get {
            return [select Parent.Type b,Count(id) c,ContentType type from Attachment group By Parent.Type,ContentType];
        }}}

<table border="1">
       <th>Object</th>
       <th>Total Attachments</th>
       <th>ContentType count</th>
   <apex:repeat value="{!results}" var="r">
       <tr></tr>
       <td> {!r['b']}</td>
       <td>{!mapofObject[r['b']]}</td>
       <td> {!r['c']}</td>
   </apex:repeat>
   </table> 

预期产出

Object    Total Attachments ContentTypecount    
Contact              4        1 
Contact              4        2 
Contact              4        1     
Opportunity          4        2 
Opportunity          4        1 
Opportunity          4        1
Account              3        2
Account              3        1

Object    TotalAttachments  ContentTypecount    
Contact           4           1 
Contact                       2 
Contact                       1     
Opportunity       4           2
Opportunity                   1 
Opportunity                   1
Account           3           2
Account                       1  

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每个sObject的总计是否必须是一个单独的列？如果它可以是一个小计行（如在报告中），那么使用

分组汇总可以非常轻松地完成它：