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vandana rajuvandana raju 

rollupsummary field in trigger

I am trying to understand data modelling in salesforce.
I have a rollup summary field defined between two custom objects (involved in a Master-detail relationship).
can I access the rollup summary field in a trigger written on child object which will update the parent object field based on some calculation?

any help with a smal piece of code will he greatly helpful.

Hi Vandana
You can write SOQL Query to get rollup summary field in child like this
select id,Relation__r.ParentRollUpField__c from Child__c 

Thank You