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Trigger Help needed

Hi ,


 I want to write a trigger which would copy the sample id( sample is a custom object ) to a text field created in another custom object called as pet(pet__c), Kindly help me on this issuse.








Do you have any Look'Up or Master-Detail relationship between Sample__c object and Pet__c object, if so then you can try using cross object formula and see if that helps.


But if you still want to create a trigger, a good place to get started is from here