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switi lokhandeswiti lokhande 

Two objects customer nd address both are having lookup relationship write a trigger that supports the cascade deletion proporty

AnkaiahAnkaiah (Salesforce Developers) 
Hi Switi,

Which one is parent and child?

Thanks!!
switi lokhandeswiti lokhande
Customer is child nd adress is parent
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AnkaiahAnkaiah (Salesforce Developers) 
Hi Switi,

try with below code. Replace the object & field api names as per your org. 
Trigger deleteclidrecords on address__C(before delete){

set<id> addids = new set<id>();

for(adress__C add:trigger.old){
addids.add(add.id);
}

List<customer__c> customerlistdelete = [select id from customer__c where adress__C=:addids ];

delete customerlistdelete;
}

if this helps, Please mark it as best answer.

Thanks!!