tutorial23FetchingCHildRecords

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//Fetching Child Records using SOQL
List<apex_customer__c> ListCustomers = [SELECT Name, Id, (SELECT id, Name FROM Invoices__r) FROM APEX_Customer__c WHERE Name = 'ABC Customer'];//Query for fetching the Child records along with Parent
System.debug('ListCustomers '+ListCustomers);//Parent Record

List<apex_invoice__c> ListOfInvoices = ListCustomers[0].Invoices__r;//By this notation, you could fetch the child records and save it in List
System.debug('The invoice records related to the ABC customer '+ListOfInvoices);//Child records