I am very new to writing triggers hence would like some direction on how to write one, apologies.
Scenario: I have Custom Object (Location__c) which contains custom fields postcode (LL_Postcode_c) and (LL_Location_Number__c).
When both values in a Location object record match the values of fields in Account object (A_Postcode__c) and (A_Location_Number__c), respectively I would like the Account lookup field (named A_Location__c) to populate with the name of Location record where the two fields matched.
Can you please point me to the right direction as to how to proceed with this?
Many thanks for your help!