如果条件在ng-repeat上变量

I get data in angularjs from sql query as:

{"orders":[
{
    "orderId":"1674","itemId":"468","SubTotal":"40.00","Total":"48.98","Status":"Printed","Title":"Mangled : Large","Quantity":"1","dateCreated":"2009-06-03"
},
{
    "orderId":"1674","itemId":"469","SubTotal":"40.00","Total":"48.98","Status":"Printed","Title":"Skull Collage : Large","Quantity":"1","dateCreated":"2009-06-03"
},
{
    "orderId":"1675","itemId":"33949","SubTotal":"40.00","Total":"48.98","Status":"Printed","Title":"Summerside \"The Saved\" EP CD -Red or Blue! : BLUE","Quantity":"1","dateCreated":"2009-06-03" 
},
{
    "orderId":"1674","itemId":"33954","SubTotal":"40.00","Total":"48.98","Status":"Printed","Title":"Summerside \"The Saved\" EP CD -Red or Blue! : RED","Quantity":"1","dateCreated":"2009-06-03"
}]}

now I want to find out how many records are having same orderId, so that I could place them in same section/div and display it as 1 group.

I am using ng-repeat to display data.

<div ng-repeat="order in itemorders">
<div class="order-lis-box border-radius">
    <div class="up line overflow-hidden text">
        <div class="fl black mb10">Order No. <span>{{ order.orderId }}</span><br><span class="capitalize grey F14 bold">Rs. {{ order.Total }}</span></div>
        <div class="custom-datetime text-right">{{ order.dateCreated }}</div>
    </div>
    .
    .
    .
</div> <!-- order-lis-box -->

What should I add use so I could show the way I want?